[Win32k]
- Fix G/SetSystemMenu. Move code into menu.c.
- Add loading for MDI system menu.


git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@63455 97493ccd-5924-5043-b1f5-66cb403b36ce
[Win32k]
- Use desktop system menu.

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@63456 97493ccd-5924-5043-b1f5-66cb403b36ce
[Win32k]
- Make minimizing windows in MDI application usable, more fixing is needed. ReactOS suffers from wine poisoning. Need more Vodka! See wine Bug 1719.



git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@63457 97493ccd-5924-5043-b1f5-66cb403b36ce