VASTLY IMPROVE dragging experience

--when dragging a new applet over the view
the responsiveness is now improved vastly
--the new architecture uses two different
DragAndDropAreas. One which is the old one
and is used when dragged launchers, urls and
separators. The second is used only when
applets are dragged into the view
--the visuals for adding launchers/applets have
been improved and a circular visual is preferred
now instead