Allow FillMode.Fit inside FlowContainers if only one axis is autosize
Allow FillMode.Fit inside FlowContainers if only one axis is autosize

This can be useful in certain cases. Right now it is used within
tournament drawings of osu-lazer.

ppy/osu-framework,peppy/osu-framework,EVAST9919/osu-framework,smoogipooo/osu-framework,DrabWeb/osu-framework,peppy/osu-framework,Nabile-Rahmani/osu-framework,Tom94/osu-framework,Nabile-Rahmani/osu-framework,DrabWeb/osu-framework,paparony03/osu-framework,EVAST9919/osu-framework,default0/osu-framework,ppy/osu-framework,smoogipooo/osu-framework,default0/osu-framework,ppy/osu-framework,EVAST9919/osu-framework,naoey/osu-framework,naoey/osu-framework,DrabWeb/osu-framework,EVAST9919/osu-framework,Tom94/osu-framework,ZLima12/osu-framework,peppy/osu-framework,paparony03/osu-framework,ZLima12/osu-framework