[Not compilable] started implementing Notifications
impriving basic notification implementation
little improvement
little improvements
started new design of the notifications
Refactoring: Moved notification files to own directory
refactoring: fixed intendation and renamed wiget class
Merge branch 'feature-3-refactoring-properties' into feature-11-notification-area
started implementing notification manager
shelved
added notification representation factory
registering representation factories is working now
created subdirectory for different representations
added notification-dialog
added notification-dialog
started implementing the notification dialog
added comments
notification representations can now give a hint whether to show them or not
preparing first test
Merge branch 'feature-11-notification-area' into feature-3-refactoring-properties