355654487e
Using a non-null background brush does remove an initial white flash while the program is loading and before we start painting. But this results in some extra and unnecessary redraws. Default WM_ERASEBKGND behaviour is to do nothing if this is brush is null, so if non-null we get erased and must redraw. Suppressing WM_ERASEBKGND will not give us that initial paint, so no benefit in keeping the brush added in #115968. Pull Request: https://projects.blender.org/blender/blender/pulls/116642