Add KXmlGui and it's dependencies

Dependencies are: QtSvg, KIconThemes, KItemViews and KConfigWidgets

• patches/kconfigwidgets/0001-Make-QDbus-optional.patch patches/kconfigwidgets/0002-Crudely-remove-KF5Auth-depedency.patch patches/kiconthemes/0001-Make-DBus-optional.patand patches/kxmlgui/0001-Make-KGlobalAccel-dependency-optional.patch patches/kxmlgui/0002-Make-QDBus-dependency-optional.patch patches/kxmlgui/0003-Make-KTextWidgets-optional.patch patches/kxmlgui/0004-Cruedly-disable-KSendbugmail.patch patches/qtsvg/qtsvg-link-zlib.patch src/inst-kconfigwidgets.nsi src/inst-kiconthemes.nsi src/inst-kxmlgui.nsi src/inst-qtsvg.nsi src/uninst-kconfigwidgets.nsi src/uninst-kiconthemes.nsi src/uninst-kxmlgui.nsi src/uninst-qtsvg.nsi: New.
• Makefile.am (EXTRA_DIST): Add new Patches.
• configure.ac: Declare new packages.
• pacakges/packages.current: Add new Packages.
• src/Makefile.am: Add new things.
• src/config.nsi.in, src/inst-sections.nsi: Update accordingly.
• src/gpg4win.mk.in: Add Qt hacks for QtSvg.

The patches to make some dependencies optional are partly under
review and might make it upstream.