Preparations for auto login (properties)
+ PorpertyHandler: added properties for auto join
+ SettingsStage: settings window (not finished, early stage)
+ settings view: tabbed settings with. Implementation of main structure and network settings (join, bootstrapping nodes)
+ theme and dummy icons for settings
~ Small refactoring (settings view)
~ commented out jemmyfx dependencies
+ refactoring of property handling, exception handling, etc.
+ added default property resource
~ Bugfixing (nullpointer)
+ join network: read auto join settings
+ System tray: basic menu (without actions)
+ Bugfix (progress indicator did not disappear)
+ Moved dragging logic from App into MainView
+ Refactoring of App class, preparations for different start scenarios (auto login etc.)
+ Small fixes and comments