Move WedgeBackground to its own class and improve display a bit.
Move WedgeBackground to its own class and improve display a bit.

Drezi126/osu,UselessToucan/osu,Damnae/osu,nyaamara/osu,2yangk23/osu,naoey/osu,naoey/osu,NotKyon/lolisu,NeoAdonis/osu,RedNesto/osu,johnneijzen/osu,DrabWeb/osu,ppy/osu,DrabWeb/osu,peppy/osu,UselessToucan/osu,naoey/osu,theguii/osu,johnneijzen/osu,smoogipoo/osu,UselessToucan/osu,Frontear/osuKyzer,peppy/osu-new,smoogipoo/osu,2yangk23/osu,NeoAdonis/osu,ppy/osu,ppy/osu,osu-RP/osu-RP,smoogipooo/osu,peppy/osu,tacchinotacchi/osu,DrabWeb/osu,ZLima12/osu,EVAST9919/osu,peppy/osu,EVAST9919/osu,Nabile-Rahmani/osu,smoogipoo/osu,default0/osu,ZLima12/osu,NeoAdonis/osu