added string widget creator
started adding dummy-progress indicator
little fix
[NOT COMPILABLE] started adding long process validation test
added widget for the wait time property
checking now, whether the waitTime Property is empty
simple validation is working now
now the invalid notification doesn't get hidden anymore
Merge branch 'shelve-long-process-validation' into feature-11-notification-area
added close method to allow a seperation of closing and hiding a notification
replaced hideIfAllRepresentationsClosed with closeIfAllRepresentationsClosed to match the original functionality
bugfix
added todo note
notification destructor calls now close
bugfix
the default button close now the notification instead of just hiding it
bugfix: handling the reference pointer is working now
closing now the notification instead of hiding
Merge branch 'changing-hide/close-usage' into feature-11-notification-area
Merge branch 'feature-11-notification-area' into shelve-long-process-validation