i.e. paint to VirtualDevice as well, not only to Window.
Removed the no longer needed switch between buffered and unbuffered overlay,
this removes the flickering white block.
(cherry picked from commit 5ab32faf2426fa60f975d0b544cfd671cdc7983b)
Conflicts:
editeng/inc/editeng/outliner.hxx
editeng/source/editeng/impedit.hxx
editeng/source/editeng/impedit3.cxx
editeng/source/editeng/impedit4.cxx
svx/inc/svx/sdr/overlay/overlaymanager.hxx
svx/inc/svx/sdr/overlay/overlaymanagerbuffered.hxx
svx/inc/svx/sdrpaintwindow.hxx
svx/inc/svx/svdpagv.hxx
svx/source/sdr/overlay/overlaymanager.cxx
svx/source/svdraw/sdrpaintwindow.cxx
svx/source/svdraw/svdedxv.cxx
svx/source/svdraw/svdpagv.cxx
Change-Id: Ibf4fcba77b120187fbae2454d136d2acd74be119
3137258e34