Controls Overlay for MAME Games

Having the ability to use a mapped button or key to pause the game and during Pause, show the mapped controls per game, much like the way CPWizard works.

Right now, I have to use BigBox in front of RocketLauncher in fromt of Mame to actually get this to work and leads to some frustrating configuration moments.

As a cabinet front end, an AMAZING feature would be to be able to show what buttons perform what action within each game.