Removed unused constructor parameter.
Fixed object tree addFilter behavior. Added exit to exit button.
Added ScrollbarPolicy to ObjectTree.
removed toolbar.
Added funktions and dialogs to open and save buttons.
Added shortcuts and a temporary exit shortcut. Added save button
Changed Text.
Added filter icon from awesome TA-master Caal.
Added new icon to the app and removed debug coloring.
Added "Add new object" widget.