[Wpf] Add missing HasCompletions implementation introduced in 228785a905520c5952e0df102ff8b3a505cff144
[Wpf] Add missing HasCompletions implementation
introduced in 228785a905520c5952e0df102ff8b3a505cff144

lytico/xwt,hamekoz/xwt,residuum/xwt,akrisiun/xwt,TheBrainTech/xwt,mono/xwt,hwthomas/xwt,cra0zy/xwt,antmicro/xwt