private void ShowHistoryWindow(object sender, RoutedEventArgs e)
 {
     if (SingleItemSelected)
     {
         VisualHgDialogs.ShowHistoryWindow(GetSelectedFiles().First());
     }
 }
 private void ShowRevertWindow(object sender, RoutedEventArgs e)
 {
     VisualHgDialogs.ShowRevertWindow(GetSelectedFiles());
 }