fixes #5031 - extra checking if dockable="true" before taking action prvents exceptions.
fixes #5031 - extra checking if dockable="true" before taking action prvents exceptions.



git-svn-id: ee6e786acc44c9cca5ee17c71a5576c45c210361@11452 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful