private void CustomComboBox_OnItemClicked(object sender, ItemClcikedEventArgs e)
 {
     //TODO move to notification VM
     var notification = ((FrameworkElement) sender).DataContext as SomeOneEditingFileViewModel;
     var user = e.Item as UserViewModel;
     if (notification != null && user != null)
     {
         notification.UserClicked.Execute(user);
     }
 }
 private void versionList_VersionClciked(object sender, ItemClcikedEventArgs e)
 {
     _vm.GoToVersionInBroweserCommand.Execute(e.Item);
 }