Improve OsuTextFlowContainer with framework.
Improve OsuTextFlowContainer with framework.

EVAST9919/osu,ppy/osu,EVAST9919/osu,NeoAdonis/osu,ZLima12/osu,smoogipooo/osu,peppy/osu,Nabile-Rahmani/osu,ppy/osu,UselessToucan/osu,naoey/osu,Frontear/osuKyzer,DrabWeb/osu,Damnae/osu,NeoAdonis/osu,Drezi126/osu,smoogipoo/osu,smoogipoo/osu,naoey/osu,UselessToucan/osu,peppy/osu,ppy/osu,2yangk23/osu,peppy/osu-new,johnneijzen/osu,ZLima12/osu,peppy/osu,UselessToucan/osu,smoogipoo/osu,DrabWeb/osu,johnneijzen/osu,DrabWeb/osu,NeoAdonis/osu,2yangk23/osu,naoey/osu