Method RemoveSource

FastCopy/RobocopyViewModel.h:51–51

        void AddSource() { ++m_useSourceCount; raisePropertyChange(L"UseSource"); }
        void RemoveSource() { --m_useSourceCount; raisePropertyChange(L"UseSource"); }
        void AddDestination() { ++m_useDestinationCount; raisePropertyChange(L"UseDestination"); }
        void RemoveDestination() { --m_useDestinationCount; raisePropertyChange(L"UseDestination"); }