[WIN32k]

[WIN32k]
 -Fix a couple of cases where we use the versioned class atom instead of the non versioned one.

[USER32]
- Add support for versioned classes in RegisterClassExWOWW, GetClassInfoExW, GetClassInfoExA, UnregisterClassA, UnregisterClassW, and User32CreateWindowEx
- Make ClassNameToVersion return the name of the versioned class and the library name that implements it while preserving a hack that lets user32 know which classes are registered by comctl32 (this is needed because the default activation context doesn't contain the non versioned classes yet).
- Make VersionRegisterClass to load the specified library and make it register its classes which is used when the class is not registered yet but its manifest is active.

svn path=/trunk/; revision=73806