Use unique touch mouse class for iOS and Android.
Enable touch mouse for arcade lightgun games or when maple device A is a
lg. Disable it otherwise.
android: only display controllers that actually send events, including
system mouse and keyboard. Use separate Touch Mouse and System Mouse.
iOS: fix missing button input for touch mouse. Don't bubble up touch
events that hit vgampad buttons or controls.
ggpo: support for arcade games using keyboard (totd, luptype) and
mouse/rotary encoders (waiwai drive)
Chat and UI now usable when the keyboard is not set to a maple port.
Flyinghead