KWindowSystem::compositingActive() works without a QApplication instance.
* Make terminal display intercept shortcuts using the Backspace/Home/End keys 
( fixes backspace key triggering the 'Go Back' action in Dolphin when 
terminal part has the focus )
* Add some plumbing that will be used to handle resizing by the terminal 
program.
* Misc. tidy-ups and EBN fixes.
* Update the right part of the terminal display when updating blinking 
cursor.


svn path=/trunk/KDE/kdebase/apps/konsole/; revision=668460