Added request for SDL handling the desktop background window

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403755

TODO

@@ -30,7 +30,7 @@
  * Implement SDL_RenderReadPixels() for screenshots and automated testing
  * Create extended set of (negative) error codes and have the API functions document and return them.
  * Add clipboard support (from scrap demo)
-
+ * Add support for desktop windows?
 
 Wish list for the 1.3 development branch:
 http://bugzilla.libsdl.org/