which are also valid terminal key sequences should be overridden and sent
to the terminal instead.

Default behaviour in the standalone Konsole is never to override shortcuts.  Default
behaviour in the terminal part is to always override shortcuts.

Shortcuts which are not valid terminal key sequences (eg. because they have more than
two modifiers) are never overridden.

Add an overrideShortcut() signal to the Part to expose this functionality to clients.

CCMAIL: kde-core-devel@kde.org

svn path=/trunk/KDE/kdebase/apps/konsole/; revision=799577