working on #202: enabled/disabled state of the button
working on #202: enabled/disabled state of the button. switched to PC Listener of bean
working on #202: sync the preview map with the geometry
working on #202: impl magic wand functionality
and optimized geom origin visualization (icons)
working on #202: improving log messages
Merge branch 'feature/202-magic-wand-stadtbildserieneditor' into dev