[PATCH 0/6] MR1964: dxgi: Catch nested SetFullscreenState invocations.

[Stefan Dösinger (＠stefan)]

FFXIV depends on this. It calls SetFullscreenState when it receives WM_WINDOWPOSCHANGED. Through luck the recursion aborts after two calls. The user-visible bug is that after leaving fullscreen, the game's window is still TOPMOST because we overwrite the stored pre-fullscreen window flags.