private void MoveFastKeyOnClick(object sender, RoutedEventArgs e)
        {
            string      newPath = (_isFirstFocused ? SecondPanelPath : FirstPanelPath).Text;
            List <Item> items   = (_isFirstFocused ? FirstPanel : SecondPanel).Items.Cast <Item>()
                                  .Where(item => item.IsChecked).ToList();


            OperationWindow operationWindow = new OperationWindow("Moving");

            operationWindow.OnFinish += (o, s) =>
            {
                UpdatePanels();
                operationWindow.Close();
            };
            operationWindow.Show();
            operationWindow.Move(items, newPath);

            UpdatePanels();
        }