Debugger: Add view menu to toolbar

Change-Id: I8783ce66d28626e9a484d6aa729fccd07bbda0b8
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Adapt the escape key logic for external windows.

Change-Id: I294ba18e8ca91060e5d0ef8f81885642e045a975
Reviewed-by: David Schulz <david.schulz@digia.com>