#4 rotating options

[Anonymous]

I have a rotating monitor and would like to be
able to map a key to rotating the orientation
of game launcher. Also it would be nice to be
able to toggle the flags passed to mame for
games. For instance toggle the horiz/rol/ror
flag passed (for advancemame, which I use, it's
display_rol/display_ror IIRC). I used to
use ArcadeOS which allowed this.

thanks for a great frontend!