Simplify and centralise hiding logic for mod overlay
Simplify and centralise hiding logic for mod overlay

Behaviourally, this also always toggles via button triggering to add the
button flash animation.

peppy/osu,ppy/osu,NeoAdonis/osu,NeoAdonis/osu,NeoAdonis/osu,ppy/osu,peppy/osu,peppy/osu,ppy/osu