Cache beatmap tracker and bind to selected item in `RoomSubScreen`
Cache beatmap tracker and bind to selected item in `RoomSubScreen`

smoogipoo/osu,NeoAdonis/osu,peppy/osu-new,UselessToucan/osu,smoogipoo/osu,ppy/osu,peppy/osu,UselessToucan/osu,peppy/osu,NeoAdonis/osu,ppy/osu,smoogipoo/osu,ppy/osu,NeoAdonis/osu,smoogipooo/osu,peppy/osu,UselessToucan/osu