private void _baseNodeUriDownButton_Click(object sender, RoutedEventArgs e)
{
var item = _baseNodeUrisListView.SelectedItem as string;
if (item == null) return;
var selectIndex = _baseNodeUrisListView.SelectedIndex;
if (selectIndex == -1) return;
_baseNode_Uris.Move(selectIndex, selectIndex + 1);
_baseNodeUpdate();
}