[WPF] Add ListDataSource.Clear()
[WPF] Add ListDataSource.Clear()

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