fixed #52 consider ctrl-a to select all nodes in the capability widget
Merge branch 'bug/52-capability-widget-selection' into dev
fixed #53 PFeature throws a NullPointerException, if an info node should be removed and the corresponding feature annotation symbol has no children.
Merge branch 'bug/53-stations-cannot-be-moved-properly' into dev
#52 consider mouse clicks on an already selected node, which do not fire tree selection events
jalopy minor changes