Add support for background changing
Add support for background changing

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