Cleaned up window_darwin.m's data structure juggling.
Cleaned up window_darwin.m's data structure juggling.

ProtonMail/libui,sclukey/libui,mantyr/libui,tbodt/libui,ProtonMail/libui,ProtonMail/libui,mantyr/libui,tbodt/libui,sclukey/libui,mantyr/libui