Also implements a new menu item flag: MENUITEMFLAG_SLIDER_DEFERRED,
which only calls the MENUOP_GETSLIDER callback on entering dimmed mode,
storing its value for later ticks, and only calls the MENUOP_SET
callback on leaving dimmed mode. This was necessary to prevent the
framerate limit slider from immediately affecting the framerate, leading
to an annoying slow down as the value was decremented to 0.
Fullscreen exclusive mode is togglable at runtime, as well, as a
dropdown menu with "borderless" and "exclusive" options. All variables
pertaining to video resolution, exclusive mode, and maximized state are
now synchronized. For instance, Alt+Enter will affect the state of the
fullscreen video option and maximizing the window via the title bar will
update the maximize window option accordingly.
--log: logs messages to pd.log
--boot-stage N: sets initial stage number to N (MP stages will crash or hang if booted like this)
--no-sound: disable sound
--rom-file S: set ROM filename
Oleg