Sierra (macOS 10.12) changed the behavior of key repeat.  In previous versions
of macOS, key repeat stops when a modifier key is pressed or released.  In
Sierra, it does not; it just keeps repeating as newly-modified.

On Windows, key repeat stops when a modifier key is pressed, although not when
one is released.  Some programs depend on this behavior.  So, the Mac driver
emulates it.
Signed-off-by: Ken Thomases <ken@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>