diff --git a/src/view/tabwidget.cpp b/src/view/tabwidget.cpp
index 4d3fdc37a..a28d5813d 100644
--- a/src/view/tabwidget.cpp
+++ b/src/view/tabwidget.cpp
@@ -1,1017 +1,1020 @@
 /* -*- mode: c++; c-basic-offset:4 -*-
     view/tabwidget.cpp
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2007 Klarälvdalens Datakonsult AB
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include <config-kleopatra.h>
 
 #include "tabwidget.h"
 #include "keytreeview.h"
 #include "kleopatra_debug.h"
 
+#include <settings.h>
+
 #include <utils/action_data.h>
 
 #include <Libkleo/Stl_Util>
 #include <Libkleo/KeyFilter>
 #include <Libkleo/KeyFilterManager>
 #include <Libkleo/KeyListModel>
 #include <Libkleo/KeyListSortFilterProxyModel>
 
 #include <gpgme++/key.h>
 
 #include <KLocalizedString>
 #include <QTabWidget>
 #include <KConfigGroup>
 #include <KSharedConfig>
 #include <KConfig>
 #include <QAction>
 #include <KActionCollection>
 #include <QInputDialog>
 
 #include <QTreeView>
 #include <QToolButton>
 #include <QMenu>
 #include <QVBoxLayout>
 #include <QRegularExpression>
 #include <QAbstractProxyModel>
 
 #include <map>
 
 using namespace Kleo;
 using namespace GpgME;
 
 namespace
 {
 
 class Page : public Kleo::KeyTreeView
 {
     Q_OBJECT
     Page(const Page &other);
 public:
     Page(const QString &title, const QString &id, const QString &text, AbstractKeyListSortFilterProxyModel *proxy = nullptr, const QString &toolTip = QString(), QWidget *parent = nullptr, const KConfigGroup &group = KConfigGroup());
     Page(const KConfigGroup &group, QWidget *parent = nullptr);
     ~Page() override;
 
     void setTemporary(bool temporary);
     bool isTemporary() const
     {
         return m_isTemporary;
     }
 
     void setHierarchicalView(bool hierarchical) override;
     void setStringFilter(const QString &filter) override;
     void setKeyFilter(const std::shared_ptr<KeyFilter> &filter) override;
 
     QString title() const
     {
         return m_title.isEmpty() && keyFilter() ? keyFilter()->name() : m_title;
     }
     void setTitle(const QString &title);
 
     QString toolTip() const
     {
         return m_toolTip.isEmpty() ? title() : m_toolTip;
     }
     // not used void setToolTip(const QString &tip);
 
     bool canBeClosed() const
     {
         return m_canBeClosed;
     }
     bool canBeRenamed() const
     {
         return m_canBeRenamed;
     }
     bool canChangeStringFilter() const
     {
         return m_canChangeStringFilter;
     }
     bool canChangeKeyFilter() const
     {
         return m_canChangeKeyFilter && !m_isTemporary;
     }
     bool canChangeHierarchical() const
     {
         return m_canChangeHierarchical;
     }
 
     void saveTo(KConfigGroup &group) const;
 
     Page *clone() const override
     {
         return new Page(*this);
     }
 
     void liftAllRestrictions()
     {
         m_canBeClosed = m_canBeRenamed = m_canChangeStringFilter = m_canChangeKeyFilter = m_canChangeHierarchical = true;
     }
 
 Q_SIGNALS:
     void titleChanged(const QString &title);
 
 private:
     void init();
 
 private:
     QString m_title;
     QString m_toolTip;
     bool m_isTemporary : 1;
     bool m_canBeClosed : 1;
     bool m_canBeRenamed : 1;
     bool m_canChangeStringFilter : 1;
     bool m_canChangeKeyFilter : 1;
     bool m_canChangeHierarchical : 1;
 };
 } // anon namespace
 
 Page::Page(const Page &other)
     : KeyTreeView(other),
       m_title(other.m_title),
       m_toolTip(other.m_toolTip),
       m_isTemporary(other.m_isTemporary),
       m_canBeClosed(other.m_canBeClosed),
       m_canBeRenamed(other.m_canBeRenamed),
       m_canChangeStringFilter(other.m_canChangeStringFilter),
       m_canChangeKeyFilter(other.m_canChangeKeyFilter),
       m_canChangeHierarchical(other.m_canChangeHierarchical)
 {
     init();
 }
 
 Page::Page(const QString &title, const QString &id, const QString &text, AbstractKeyListSortFilterProxyModel *proxy, const QString &toolTip, QWidget *parent,
            const KConfigGroup &group)
     : KeyTreeView(text, KeyFilterManager::instance()->keyFilterByID(id), proxy, parent, group),
       m_title(title),
       m_toolTip(toolTip),
       m_isTemporary(false),
       m_canBeClosed(true),
       m_canBeRenamed(true),
       m_canChangeStringFilter(true),
       m_canChangeKeyFilter(true),
       m_canChangeHierarchical(true)
 {
     init();
 }
 
 static const char TITLE_ENTRY[] = "title";
 static const char STRING_FILTER_ENTRY[] = "string-filter";
 static const char KEY_FILTER_ENTRY[] = "key-filter";
 static const char HIERARCHICAL_VIEW_ENTRY[] = "hierarchical-view";
 static const char COLUMN_SIZES[] = "column-sizes";
 static const char SORT_COLUMN[] = "sort-column";
 static const char SORT_DESCENDING[] = "sort-descending";
 
 Page::Page(const KConfigGroup &group, QWidget *parent)
     : KeyTreeView(group.readEntry(STRING_FILTER_ENTRY),
                   KeyFilterManager::instance()->keyFilterByID(group.readEntry(KEY_FILTER_ENTRY)),
                   nullptr, parent, group),
       m_title(group.readEntry(TITLE_ENTRY)),
       m_toolTip(),
       m_isTemporary(false),
       m_canBeClosed(!group.isImmutable()),
       m_canBeRenamed(!group.isEntryImmutable(TITLE_ENTRY)),
       m_canChangeStringFilter(!group.isEntryImmutable(STRING_FILTER_ENTRY)),
       m_canChangeKeyFilter(!group.isEntryImmutable(KEY_FILTER_ENTRY)),
       m_canChangeHierarchical(!group.isEntryImmutable(HIERARCHICAL_VIEW_ENTRY))
 {
     init();
     setHierarchicalView(group.readEntry(HIERARCHICAL_VIEW_ENTRY, true));
     const QList<int> settings = group.readEntry(COLUMN_SIZES, QList<int>());
     std::vector<int> sizes;
     sizes.reserve(settings.size());
     std::copy(settings.cbegin(), settings.cend(), std::back_inserter(sizes));
     setColumnSizes(sizes);
     setSortColumn(group.readEntry(SORT_COLUMN, 0),
                   group.readEntry(SORT_DESCENDING, true) ? Qt::DescendingOrder : Qt::AscendingOrder);
 }
 
 void Page::init()
 {
 
 }
 
 Page::~Page() {}
 
 void Page::saveTo(KConfigGroup &group) const
 {
 
     group.writeEntry(TITLE_ENTRY,         m_title);
     group.writeEntry(STRING_FILTER_ENTRY, stringFilter());
     group.writeEntry(KEY_FILTER_ENTRY,    keyFilter() ? keyFilter()->id() : QString());
     group.writeEntry(HIERARCHICAL_VIEW_ENTRY, isHierarchicalView());
     QList<int> settings;
     const auto sizes = columnSizes();
     settings.reserve(sizes.size());
     std::copy(sizes.cbegin(), sizes.cend(), std::back_inserter(settings));
     group.writeEntry(COLUMN_SIZES,        settings);
     group.writeEntry(SORT_COLUMN,         sortColumn());
     group.writeEntry(SORT_DESCENDING,     sortOrder() == Qt::DescendingOrder);
 }
 
 void Page::setStringFilter(const QString &filter)
 {
     if (!m_canChangeStringFilter) {
         return;
     }
     KeyTreeView::setStringFilter(filter);
 }
 
 void Page::setKeyFilter(const std::shared_ptr<KeyFilter> &filter)
 {
     if (!canChangeKeyFilter()) {
         return;
     }
     const QString oldTitle = title();
     KeyTreeView::setKeyFilter(filter);
     const QString newTitle = title();
     if (oldTitle != newTitle) {
         Q_EMIT titleChanged(newTitle);
     }
 }
 
 void Page::setTitle(const QString &t)
 {
     if (t == m_title) {
         return;
     }
     if (!m_canBeRenamed) {
         return;
     }
     const QString oldTitle = title();
     m_title = t;
     const QString newTitle = title();
     if (oldTitle != newTitle) {
         Q_EMIT titleChanged(newTitle);
     }
 }
 
 #if 0 // not used
 void Page::setToolTip(const QString &tip)
 {
     if (tip == m_toolTip) {
         return;
     }
     if (!m_canBeRenamed) {
         return;
     }
     const QString oldTip = toolTip();
     m_toolTip = tip;
     const QString newTip = toolTip();
     if (oldTip != newTip) {
         Q_EMIT titleChanged(title());
     }
 }
 #endif
 
 void Page::setHierarchicalView(bool on)
 {
     if (!m_canChangeHierarchical) {
         return;
     }
     KeyTreeView::setHierarchicalView(on);
 }
 
 void Page::setTemporary(bool on)
 {
     if (on == m_isTemporary) {
         return;
     }
     m_isTemporary = on;
     if (on) {
         setKeyFilter(std::shared_ptr<KeyFilter>());
     }
 }
 
 namespace
 {
 class Actions
 {
 public:
     constexpr static const char *Rename = "window_rename_tab";
     constexpr static const char *Duplicate = "window_duplicate_tab";
     constexpr static const char *Close = "window_close_tab";
     constexpr static const char *MoveLeft = "window_move_tab_left";
     constexpr static const char *MoveRight = "window_move_tab_right";
     constexpr static const char *Hierarchical = "window_view_hierarchical";
     constexpr static const char *ExpandAll = "window_expand_all";
     constexpr static const char *CollapseAll = "window_collapse_all";
 
     explicit Actions() {}
 
     void insert(const std::string &name, QAction *action)
     {
         actions.insert({name, action});
     }
 
     auto get(const std::string &name) const
     {
         const auto it = actions.find(name);
         return (it != actions.end()) ? it->second : nullptr;
     }
 
     void setChecked(const std::string &name, bool checked) const
     {
         if (auto action = get(name)) {
             action->setChecked(checked);
         }
     }
 
     void setEnabled(const std::string &name, bool enabled) const
     {
         if (auto action = get(name)) {
             action->setEnabled(enabled);
         }
     }
 
     void setVisible(const std::string &name, bool visible) const
     {
         if (auto action = get(name)) {
             action->setVisible(visible);
         }
     }
 
 private:
     std::map<std::string, QAction *> actions;
 };
 }
 
 //
 //
 // TabWidget
 //
 //
 
 class TabWidget::Private
 {
     friend class ::Kleo::TabWidget;
     TabWidget *const q;
 public:
     explicit Private(TabWidget *qq);
     ~Private() {}
 
 private:
     void slotContextMenu(const QPoint &p);
     void currentIndexChanged(int index);
     void slotPageTitleChanged(const QString &title);
     void slotPageKeyFilterChanged(const std::shared_ptr<KeyFilter> &filter);
     void slotPageStringFilterChanged(const QString &filter);
     void slotPageHierarchyChanged(bool on);
 
 #ifndef QT_NO_INPUTDIALOG
     void slotRenameCurrentTab()
     {
         renamePage(currentPage());
     }
 #endif // QT_NO_INPUTDIALOG
     void slotNewTab();
     void slotDuplicateCurrentTab()
     {
         duplicatePage(currentPage());
     }
     void slotCloseCurrentTab()
     {
         closePage(currentPage());
     }
     void slotMoveCurrentTabLeft()
     {
         movePageLeft(currentPage());
     }
     void slotMoveCurrentTabRight()
     {
         movePageRight(currentPage());
     }
     void slotToggleHierarchicalView(bool on)
     {
         toggleHierarchicalView(currentPage(), on);
     }
     void slotExpandAll()
     {
         expandAll(currentPage());
     }
     void slotCollapseAll()
     {
         collapseAll(currentPage());
     }
 
 #ifndef QT_NO_INPUTDIALOG
     void renamePage(Page *page);
 #endif
     void duplicatePage(Page *page);
     void closePage(Page *page);
     void movePageLeft(Page *page);
     void movePageRight(Page *page);
     void toggleHierarchicalView(Page *page, bool on);
     void expandAll(Page *page);
     void collapseAll(Page *page);
 
     void enableDisableCurrentPageActions();
     void enableDisablePageActions(const Actions &actions, const Page *page);
 
     Page *currentPage() const
     {
         Q_ASSERT(!tabWidget.currentWidget() || qobject_cast<Page *>(tabWidget.currentWidget()));
         return static_cast<Page *>(tabWidget.currentWidget());
     }
     Page *page(unsigned int idx) const
     {
         Q_ASSERT(!tabWidget.widget(idx) || qobject_cast<Page *>(tabWidget.widget(idx)));
         return static_cast<Page *>(tabWidget.widget(idx));
     }
 
     Page *senderPage() const
     {
         QObject *const sender = q->sender();
         Q_ASSERT(!sender || qobject_cast<Page *>(sender));
         return static_cast<Page *>(sender);
     }
 
     bool isSenderCurrentPage() const
     {
         Page *const sp = senderPage();
         return sp && sp == currentPage();
     }
 
     QTreeView *addView(Page *page, Page *columnReference);
     void setCornerAction(QAction *action, Qt::Corner corner);
 
 private:
     AbstractKeyListModel *flatModel;
     AbstractKeyListModel *hierarchicalModel;
     QTabWidget tabWidget;
     QVBoxLayout layout;
     QAction *newAction = nullptr;
     Actions currentPageActions;
     Actions otherPageActions;
     bool actionsCreated;
 };
 
 TabWidget::Private::Private(TabWidget *qq)
     : q(qq),
       flatModel(nullptr),
       hierarchicalModel(nullptr),
       tabWidget(q),
       layout(q),
       actionsCreated(false)
 {
     KDAB_SET_OBJECT_NAME(tabWidget);
     KDAB_SET_OBJECT_NAME(layout);
 
     layout.setContentsMargins(0, 0, 0, 0);
     layout.addWidget(&tabWidget);
 
     tabWidget.tabBar()->hide();
     tabWidget.setMovable(true);
 
     tabWidget.tabBar()->setContextMenuPolicy(Qt::CustomContextMenu);
 
     connect(&tabWidget, SIGNAL(currentChanged(int)), q, SLOT(currentIndexChanged(int)));
     connect(tabWidget.tabBar(), &QWidget::customContextMenuRequested, q, [this](const QPoint & p) {
         slotContextMenu(p);
     });
 
 }
 
 void TabWidget::Private::slotContextMenu(const QPoint &p)
 {
     const int tabUnderPos = tabWidget.tabBar()->tabAt(p);
     Page *const contextMenuPage = static_cast<Page *>(tabWidget.widget(tabUnderPos));
     const Page *const current = currentPage();
 
     const auto actions = contextMenuPage == current ? currentPageActions : otherPageActions;
 
     enableDisablePageActions(actions, contextMenuPage);
 
     QMenu menu;
     if (auto action = actions.get(Actions::Rename)) {
         menu.addAction(action);
     }
     menu.addSeparator();
     menu.addAction(newAction);
     if (auto action = actions.get(Actions::Duplicate)) {
         menu.addAction(action);
     }
     menu.addSeparator();
     if (auto action = actions.get(Actions::MoveLeft)) {
         menu.addAction(action);
     }
     if (auto action = actions.get(Actions::MoveRight)) {
         menu.addAction(action);
     }
     menu.addSeparator();
     if (auto action = actions.get(Actions::Close)) {
         menu.addAction(action);
     }
 
     const QAction *const action = menu.exec(tabWidget.tabBar()->mapToGlobal(p));
     if (!action) {
         return;
     }
 
     if (contextMenuPage == current || action == newAction) {
         return;    // performed through signal/slot connections...
     }
 
 #ifndef QT_NO_INPUTDIALOG
     if (action == otherPageActions.get(Actions::Rename)) {
         renamePage(contextMenuPage);
     }
 #endif // QT_NO_INPUTDIALOG
     else if (action == otherPageActions.get(Actions::Duplicate)) {
         duplicatePage(contextMenuPage);
     } else if (action == otherPageActions.get(Actions::Close)) {
         closePage(contextMenuPage);
     } else if (action == otherPageActions.get(Actions::MoveLeft)) {
         movePageLeft(contextMenuPage);
     } else if (action == otherPageActions.get(Actions::MoveRight)) {
         movePageRight(contextMenuPage);
     }
 }
 
 void TabWidget::Private::currentIndexChanged(int index)
 {
     const Page *const page = this->page(index);
     Q_EMIT q->currentViewChanged(page ? page->view() : nullptr);
     Q_EMIT q->keyFilterChanged(page ? page->keyFilter() : std::shared_ptr<KeyFilter>());
     Q_EMIT q->stringFilterChanged(page ? page->stringFilter() : QString());
     enableDisableCurrentPageActions();
 }
 
 void TabWidget::Private::enableDisableCurrentPageActions()
 {
     const Page *const page = currentPage();
 
     Q_EMIT q->enableChangeStringFilter(page && page->canChangeStringFilter());
     Q_EMIT q->enableChangeKeyFilter(page && page->canChangeKeyFilter());
 
     enableDisablePageActions(currentPageActions, page);
 }
 
 void TabWidget::Private::enableDisablePageActions(const Actions &actions, const Page *p)
 {
     actions.setEnabled(Actions::Rename, p && p->canBeRenamed());
     actions.setEnabled(Actions::Duplicate, p);
     actions.setEnabled(Actions::Close, p && p->canBeClosed() && tabWidget.count() > 1);
     actions.setEnabled(Actions::MoveLeft, p && tabWidget.indexOf(const_cast<Page *>(p)) != 0);
     actions.setEnabled(Actions::MoveRight, p && tabWidget.indexOf(const_cast<Page *>(p)) != tabWidget.count() - 1);
     actions.setEnabled(Actions::Hierarchical, p && p->canChangeHierarchical());
     actions.setChecked(Actions::Hierarchical, p && p->isHierarchicalView());
+    actions.setVisible(Actions::Hierarchical, Kleo::Settings{}.cmsEnabled());
     actions.setEnabled(Actions::ExpandAll, p && p->isHierarchicalView());
     actions.setEnabled(Actions::CollapseAll, p && p->isHierarchicalView());
 
     if (tabWidget.count() < 2) {
         tabWidget.tabBar()->hide();
     } else {
         tabWidget.tabBar()->show();
     }
 }
 
 void TabWidget::Private::slotPageTitleChanged(const QString &)
 {
     if (Page *const page = senderPage()) {
         const int idx = tabWidget.indexOf(page);
         tabWidget.setTabText(idx, page->title());
         tabWidget.setTabToolTip(idx, page->toolTip());
     }
 }
 
 void TabWidget::Private::slotPageKeyFilterChanged(const std::shared_ptr<KeyFilter> &kf)
 {
     if (isSenderCurrentPage()) {
         Q_EMIT q->keyFilterChanged(kf);
     }
 }
 
 void TabWidget::Private::slotPageStringFilterChanged(const QString &filter)
 {
     if (isSenderCurrentPage()) {
         Q_EMIT q->stringFilterChanged(filter);
     }
 }
 
 void TabWidget::Private::slotPageHierarchyChanged(bool)
 {
     enableDisableCurrentPageActions();
 }
 
 void TabWidget::Private::slotNewTab()
 {
     const KConfigGroup group = KSharedConfig::openConfig()->group(QString::asprintf("View #%u", tabWidget.count()));
     Page *page = new Page(QString(), QStringLiteral("all-certificates"), QString(), nullptr, QString(), nullptr, group);
     addView(page, currentPage());
     tabWidget.setCurrentIndex(tabWidget.count() - 1);
 }
 
 void TabWidget::Private::renamePage(Page *page)
 {
     if (!page) {
         return;
     }
     bool ok;
     const QString text = QInputDialog::getText(q, i18n("Rename Tab"), i18n("New tab title:"), QLineEdit::Normal, page->title(), &ok);
     if (!ok) {
         return;
     }
     page->setTitle(text);
 }
 
 void TabWidget::Private::duplicatePage(Page *page)
 {
     if (!page) {
         return;
     }
     Page *const clone = page->clone();
     Q_ASSERT(clone);
     clone->liftAllRestrictions();
     addView(clone, page);
 }
 
 void TabWidget::Private::closePage(Page *page)
 {
     if (!page || !page->canBeClosed() || tabWidget.count() <= 1) {
         return;
     }
     Q_EMIT q->viewAboutToBeRemoved(page->view());
     tabWidget.removeTab(tabWidget.indexOf(page));
     enableDisableCurrentPageActions();
 }
 
 void TabWidget::Private::movePageLeft(Page *page)
 {
     if (!page) {
         return;
     }
     const int idx = tabWidget.indexOf(page);
     if (idx <= 0) {
         return;
     }
     tabWidget.tabBar()->moveTab(idx, idx - 1);
     enableDisableCurrentPageActions();
 }
 
 void TabWidget::Private::movePageRight(Page *page)
 {
     if (!page) {
         return;
     }
     const int idx = tabWidget.indexOf(page);
     if (idx < 0 || idx >= tabWidget.count() - 1) {
         return;
     }
     tabWidget.tabBar()->moveTab(idx, idx + 1);
     enableDisableCurrentPageActions();
 }
 
 void TabWidget::Private::toggleHierarchicalView(Page *page, bool on)
 {
     if (!page) {
         return;
     }
     page->setHierarchicalView(on);
 }
 
 void TabWidget::Private::expandAll(Page *page)
 {
     if (!page || !page->view()) {
         return;
     }
     page->view()->expandAll();
 }
 
 void TabWidget::Private::collapseAll(Page *page)
 {
     if (!page || !page->view()) {
         return;
     }
     page->view()->collapseAll();
 }
 
 TabWidget::TabWidget(QWidget *p, Qt::WindowFlags f)
     : QWidget(p, f), d(new Private(this))
 {
 
 }
 
 TabWidget::~TabWidget() {
     saveViews(KSharedConfig::openConfig().data());
 }
 
 void TabWidget::setFlatModel(AbstractKeyListModel *model)
 {
     if (model == d->flatModel) {
         return;
     }
     d->flatModel = model;
     for (unsigned int i = 0, end = count(); i != end; ++i)
         if (Page *const page = d->page(i)) {
             page->setFlatModel(model);
         }
 }
 
 AbstractKeyListModel *TabWidget::flatModel() const
 {
     return d->flatModel;
 }
 
 void TabWidget::setHierarchicalModel(AbstractKeyListModel *model)
 {
     if (model == d->hierarchicalModel) {
         return;
     }
     d->hierarchicalModel = model;
     for (unsigned int i = 0, end = count(); i != end; ++i)
         if (Page *const page = d->page(i)) {
             page->setHierarchicalModel(model);
         }
 }
 
 AbstractKeyListModel *TabWidget::hierarchicalModel() const
 {
     return d->hierarchicalModel;
 }
 
 void TabWidget::Private::setCornerAction(QAction *action, Qt::Corner corner)
 {
     if (!action) {
         return;
     }
     auto b = new QToolButton;
     b->setDefaultAction(action);
     tabWidget.setCornerWidget(b, corner);
 }
 
 QString TabWidget::stringFilter() const
 {
     return d->currentPage() ? d->currentPage()->stringFilter() : QString{};
 }
 
 void TabWidget::setStringFilter(const QString &filter)
 {
     if (Page *const page = d->currentPage()) {
         page->setStringFilter(filter);
     }
 }
 
 void TabWidget::setKeyFilter(const std::shared_ptr<KeyFilter> &filter)
 {
     if (!filter) {
         qCDebug(KLEOPATRA_LOG) << "TabWidget::setKeyFilter() trial to set filter=NULL";
         return;
     }
 
     if (Page *const page = d->currentPage()) {
         page->setKeyFilter(filter);
     }
 }
 
 std::vector<QAbstractItemView *> TabWidget::views() const
 {
     std::vector<QAbstractItemView *> result;
     const unsigned int N = count();
     result.reserve(N);
     for (unsigned int i = 0; i != N; ++i)
         if (const Page *const p = d->page(i)) {
             result.push_back(p->view());
         }
     return result;
 }
 
 QAbstractItemView *TabWidget::currentView() const
 {
     if (Page *const page = d->currentPage()) {
         return page->view();
     } else {
         return nullptr;
     }
 }
 
 KeyListModelInterface *TabWidget::currentModel() const
 {
     const QAbstractItemView *const view = currentView();
     if (!view) {
         return nullptr;
     }
     auto const proxy = qobject_cast<QAbstractProxyModel *>(view->model());
     if (!proxy) {
         return nullptr;
     }
     return dynamic_cast<KeyListModelInterface *>(proxy);
 }
 
 unsigned int TabWidget::count() const
 {
     return d->tabWidget.count();
 }
 
 void TabWidget::setMultiSelection(bool on)
 {
     for (unsigned int i = 0, end = count(); i != end; ++i)
         if (const Page *const p = d->page(i))
             if (QTreeView *const view = p->view()) {
                 view->setSelectionMode(on ? QAbstractItemView::ExtendedSelection : QAbstractItemView::SingleSelection);
             }
 }
 
 void TabWidget::createActions(KActionCollection *coll)
 {
     if (!coll) {
         return;
     }
     const action_data actionDataNew = {
         "window_new_tab", i18n("New Tab"), i18n("Open a new tab"),
         "tab-new-background", this, SLOT(slotNewTab()), QStringLiteral("CTRL+SHIFT+N"), false, true
     };
 
     d->newAction = make_action_from_data(actionDataNew, coll);
 
     static const std::vector<action_data> actionData = {
         {
             Actions::Rename, i18n("Rename Tab..."), i18n("Rename this tab"),
             "edit-rename", this, SLOT(slotRenameCurrentTab()), QStringLiteral("CTRL+SHIFT+R"), false, false
         },
         {
             Actions::Duplicate, i18n("Duplicate Tab"), i18n("Duplicate this tab"),
             "tab-duplicate", this, SLOT(slotDuplicateCurrentTab()), QStringLiteral("CTRL+SHIFT+D"), false, true
         },
         {
             Actions::Close, i18n("Close Tab"), i18n("Close this tab"),
             "tab-close", this, SLOT(slotCloseCurrentTab()), QStringLiteral("CTRL+SHIFT+W"), false, false
         }, // ### CTRL-W when available
         {
             Actions::MoveLeft, i18n("Move Tab Left"), i18n("Move this tab left"),
             nullptr, this, SLOT(slotMoveCurrentTabLeft()), QStringLiteral("CTRL+SHIFT+LEFT"), false, false
         },
         {
             Actions::MoveRight, i18n("Move Tab Right"), i18n("Move this tab right"),
             nullptr, this, SLOT(slotMoveCurrentTabRight()), QStringLiteral("CTRL+SHIFT+RIGHT"), false, false
         },
         {
             Actions::Hierarchical, i18n("Hierarchical Certificate List"), QString(),
             nullptr, this, SLOT(slotToggleHierarchicalView(bool)), QString(), true, false
         },
         {
             Actions::ExpandAll, i18n("Expand All"), QString(),
             nullptr, this, SLOT(slotExpandAll()), QStringLiteral("CTRL+."), false, false
         },
         {
             Actions::CollapseAll, i18n("Collapse All"), QString(),
             nullptr, this, SLOT(slotCollapseAll()), QStringLiteral("CTRL+,"), false, false
         },
     };
 
     for (const auto &ad : actionData) {
         d->currentPageActions.insert(ad.name, make_action_from_data(ad, coll));
     }
 
     for (const auto &ad : actionData) {
         // create actions for the context menu of the currently not active tabs,
         // but do not add those actions to the action collection
         auto action = new QAction(ad.text, coll);
         if (ad.icon) {
             action->setIcon(QIcon::fromTheme(QLatin1String(ad.icon)));
         }
         action->setEnabled(ad.enabled);
         d->otherPageActions.insert(ad.name, action);
     }
 
     d->setCornerAction(d->newAction,                 Qt::TopLeftCorner);
     if (auto action = d->currentPageActions.get(Actions::Close)) {
         d->setCornerAction(action, Qt::TopRightCorner);
     }
     d->actionsCreated = true;
 }
 
 QAbstractItemView *TabWidget::addView(const QString &title, const QString &id, const QString &text)
 {
     const KConfigGroup group = KSharedConfig::openConfig()->group(QString::asprintf("View #%u", d->tabWidget.count()));
     Page *page = new Page(title, id, text, nullptr, QString(), nullptr, group);
     return d->addView(page, d->currentPage());
 }
 
 QAbstractItemView *TabWidget::addView(const KConfigGroup &group)
 {
     return d->addView(new Page(group), nullptr);
 }
 
 QAbstractItemView *TabWidget::addTemporaryView(const QString &title, AbstractKeyListSortFilterProxyModel *proxy, const QString &tabToolTip)
 {
     const KConfigGroup group = KSharedConfig::openConfig()->group("KeyTreeView_default");
     Page *const page = new Page(title, QString(), QString(), proxy, tabToolTip, nullptr, group);
     page->setTemporary(true);
     QAbstractItemView *v = d->addView(page, d->currentPage());
     d->tabWidget.setCurrentIndex(d->tabWidget.count() - 1);
     return v;
 }
 
 QTreeView *TabWidget::Private::addView(Page *page, Page *columnReference)
 {
     if (!page) {
         return nullptr;
     }
 
     if (!actionsCreated) {
         auto coll = new KActionCollection(q);
         q->createActions(coll);
     }
 
     page->setFlatModel(flatModel);
     page->setHierarchicalModel(hierarchicalModel);
 
     connect(page, SIGNAL(titleChanged(QString)), q, SLOT(slotPageTitleChanged(QString)));
     connect(page, SIGNAL(keyFilterChanged(std::shared_ptr<Kleo::KeyFilter>)), q, SLOT(slotPageKeyFilterChanged(std::shared_ptr<Kleo::KeyFilter>)));
     connect(page, SIGNAL(stringFilterChanged(QString)), q, SLOT(slotPageStringFilterChanged(QString)));
     connect(page, SIGNAL(hierarchicalChanged(bool)), q, SLOT(slotPageHierarchyChanged(bool)));
 
     if (columnReference) {
         page->setColumnSizes(columnReference->columnSizes());
         page->setSortColumn(columnReference->sortColumn(), columnReference->sortOrder());
     }
 
     QAbstractItemView *const previous = q->currentView();
     const int tabIndex = tabWidget.addTab(page, page->title());
     tabWidget.setTabToolTip(tabIndex, page->toolTip());
     // work around a bug in QTabWidget (tested with 4.3.2) not emitting currentChanged() when the first widget is inserted
     QAbstractItemView *const current = q->currentView();
     if (previous != current) {
         currentIndexChanged(tabWidget.currentIndex());
     }
     enableDisableCurrentPageActions();
     QTreeView *view = page->view();
     Q_EMIT q->viewAdded(view);
     return view;
 }
 
 static QStringList extractViewGroups(const KConfig *config)
 {
     return config ? config->groupList().filter(QRegularExpression(QStringLiteral("^View #\\d+$"))) : QStringList();
 }
 
 // work around deleteGroup() not deleting groups out of groupList():
 static const bool KCONFIG_DELETEGROUP_BROKEN = true;
 
 void TabWidget::loadViews(const KConfig *config)
 {
     if (config) {
         QStringList groupList = extractViewGroups(config);
         groupList.sort();
         for (const QString &group : std::as_const(groupList)) {
             const KConfigGroup kcg(config, group);
             if (!KCONFIG_DELETEGROUP_BROKEN || kcg.readEntry("magic", 0U) == 0xFA1AFE1U) {
                 addView(kcg);
             }
         }
     }
     if (!count()) {
         // add default view:
         addView(QString(), QStringLiteral("all-certificates"));
     }
 }
 
 void TabWidget::saveViews(KConfig *config) const
 {
     if (!config) {
         return;
     }
     const auto extraView{extractViewGroups(config)};
     for (const QString &group : extraView) {
         config->deleteGroup(group);
     }
     unsigned int vg = 0;
     for (unsigned int i = 0, end = count(); i != end; ++i) {
         if (const Page *const p = d->page(i)) {
             if (p->isTemporary()) {
                 continue;
             }
             KConfigGroup group(config, QString::asprintf("View #%u", vg++));
             p->saveTo(group);
             if (KCONFIG_DELETEGROUP_BROKEN) {
                 group.writeEntry("magic", 0xFA1AFE1U);
             }
         }
     }
 }
 
 static void xconnect(const QObject *o1, const char *signal, const QObject *o2, const char *slot)
 {
     QObject::connect(o1, signal, o2, slot);
     QObject::connect(o2, signal, o1, slot);
 }
 
 void TabWidget::connectSearchBar(QObject *sb)
 {
     xconnect(sb, SIGNAL(stringFilterChanged(QString)),
              this, SLOT(setStringFilter(QString)));
     xconnect(sb, SIGNAL(keyFilterChanged(std::shared_ptr<Kleo::KeyFilter>)),
              this, SLOT(setKeyFilter(std::shared_ptr<Kleo::KeyFilter>)));
     connect(this, SIGNAL(enableChangeStringFilter(bool)),
             sb, SLOT(setChangeStringFilterEnabled(bool)));
     connect(this, SIGNAL(enableChangeKeyFilter(bool)),
             sb, SLOT(setChangeKeyFilterEnabled(bool)));
 }
 
 #include "moc_tabwidget.cpp"
 #include "tabwidget.moc"