add new fakeActor for draggable->create
gets rid of draggable and droppable in the editor and also removes the saveGroup/dragGroup functions
more disposal cleanup
first step into actors in actor groups as own view instances and a lot of DnD fixes in order to make that happen
add new files
destroy connections when actor is added to a group
remove unneeded functions
more unneeded functions
rename actor group actor
new require
move gridlines to actor editor where they belong
add convert-method for editor coordinate system
small css changes
unneeded DOM access
remove unneeded getRenderData
refactor selectable
fix delete key in editor
throwing away `dragGroup` and `saveGroup`
properly unsubscribe
adding actors to groups
add `isDragging`