Stop `Player` from blocking volume adjust when `Alt` it held
Stop `Player` from blocking volume adjust when `Alt` it held

Similar case to what we already have in `OsuScrollContainer`, so there
is precedent for handling this locally in this fashion.

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