--PropertySpace--
The JTextFields now use both Focus and Action Listener, because this
implementation is more user friendly. Due to this change you can now
accept changes by pressing enter or simple do something with the mouse
and steal the focus from the changes JTextfield.

--EditorGUI--
~(method) mkNodes // changed the name from CreateNodes to mkNodes to get
a more accurate naming.
+(method) rmNodes(GeometricObject) //this patch fixes issue number #46
and adjusts the JTree if some Object is removed.