[Mac] Fix Slider control orientation
[Mac] Fix Slider control orientation

akrisiun/xwt,antmicro/xwt,sevoku/xwt,TheBrainTech/xwt,mminns/xwt,cra0zy/xwt,residuum/xwt,hwthomas/xwt,iainx/xwt,steffenWi/xwt,hamekoz/xwt,directhex/xwt,lytico/xwt,mono/xwt,mminns/xwt