important fix the dragging quirkiness (by not changing the
boundingRect(), only paint it as if it had a different geometry)
svn path=/trunk/KDE/kdelibs/; revision=944004
still to come:
* don't paint when zoomed, replace with tool strip instead
* respect available area during drag
* smarter positioning (right now it just loads the saved position whenever it needs to reposition)
svn path=/trunk/KDE/kdelibs/; revision=884072
