Fix primary/alternate shortcuts for next/previous tab (they were the wrong way round).  More appropriate close icon in search bar.  Make Quit menu item close only the current window, not all Konsole instances.  Change the default shortcut for the Quit menu item to Ctrl+Shift+Q.  The standard Ctrl+Q is reserved for use by terminal applications.  Remove references to Application in MainWindow class.

svn path=/trunk/KDE/kdebase/apps/konsole/; revision=666372