SystemTrayIcon: * renamed to SysTrayIcon * inherits Kleo::SystemTrayIcon * add some SmartCard actions (with fake underlying commands) * use KDSignalBlocker instead of rolling it's own

KleopatraApplication:

• adapt to SysTrayIcon changes
• aggregate ReaderStatus, connect it to SysTrayIcon

Kleo::SystemTrayIcon:

• add to build

SmartCard::ReaderStatus:

• fix missing implementation of anyCardCanLearnKeys()
• fix wrong signal/slot connection
• remove now-unused property anyCardNeedsAttention

svn path=/branches/kdepim/enterprise4/kdepim/; revision=993423