It looks like this render state isn't stored in the stateblock but directly in
the device. I doubt a lot of applications depend on that though, so just
disable the test for the moment.

Also merge CreateSystemTimer() with WIN16_CreateSystemTimer() and
rename it to CreateSystemTimer16() for consistency.

comctl32: Use user32 control names from public header constants instead of defining over and over again.

comctl32/monthcal: Cleanup top drawing helper namespace, reduce parameter count in prev/next draw helpers.