Live resize on Windows. Based on Ton's patch for mac.
Removing old resize stuff. 
Windows has resize lag, which creates black gap with openGL. Still looking to fix it.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57026 954f8c5b-7b00-dc11-b283-0030488c597c