Improvements for windowless mode rendering, now works with surrounding widgets and doesn't flicker in freespin.
Improvements for windowless mode rendering, now works with surrounding widgets and doesn't flicker in freespin.

git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@5679 3c1deb5b-d424-0410-962d-aba41a686d42

OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc,hsorby/zinc,hsorby/zinc