kernel32: Don't fail unconditionally in MoveFile for directories with flag MOVEFILE_REPLACE_EXISTING.

While 6.14 is a sane default, we might want to override it on a
per-driver basis, if we have really old Windows drivers on some cards.

In theory the opengl library should release the gl resources when we
destroy the context, and the stateblock reset will recreate the dummy
textures, but I think it is cleaner to do this explicitly.

wined3d: Redownload the surface data in case of a palette change. This fixes a lot of redrawing problems in Red Alert.

wined3d: Reload the palette on a color key change. This fixes the ddex4/ddex5 samples from the dx7 sdk.

winex11: Add a critical section for the palette global variables instead of relying on the GDI lock.

comctl32/tests: Call InitCommonControlsEx() if available, fall back to InitCommonControls() for the older controls, and skip the tests altogether for the newer ones.