temporarily make main window transparent when attaching it to fullscreen window for animation, because the system sometimes flickers it shortly in front
temporarily make main window transparent when attaching it to fullscreen window for animation, because the system sometimes flickers it shortly in front

git-svn-id: 765db44a9620ed55f4f8addfd3c14fe8cd57f6bb@8671 0fceea05-a30d-0410-8a8b-80ef821fb0a1

nanoant/Skim,nanoant/Skim,nanoant/Skim,nanoant/Skim,nanoant/Skim