Improvements from Alfred:

- Add new SDL_WINDOW_FULLSCREEN_DESKTOP video mode, makes a fullscreen window the size of the desktop (i.e no window manager mode change)
- Fix crash in warp mouse if you specified null as the window
- Added new SDL_VIDEO_MINIMIZE_ON_FOCUS_LOSS Hint, if set to 0 then don't minimize a fullscreen window on focus lost (if not set or set to non-zero then minimize on focus loss)

include/SDL_hints.h

@@ -163,6 +163,13 @@ extern "C" {
  */
 #define SDL_HINT_GRAB_KEYBOARD              "SDL_GRAB_KEYBOARD"
 
+/**
+ *  \brief Minimize your SDL_Window if it loses key focus when in Fullscreen mode. Defaults to true.
+ *
+ */
+#define SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS   "SDL_VIDEO_MINIMIZE_ON_FOCUS_LOSS"
+
+	
 /**
  *  \brief  A variable controlling whether the idle timer is disabled on iOS.
  *