private void ArchiveOnClick(object sender, RoutedEventArgs e)
        {
            ChooseNameWindow chooseNameWindow = new ChooseNameWindow("Archive name");

            if ((bool)chooseNameWindow.ShowDialog())
            {
                string destination = Path.Combine(_isFirstFocused ? FirstPanelPath.Text : SecondPanelPath.Text,
                                                  chooseNameWindow.NewName) + ".zip";
                OperationWindow operationWindow = new OperationWindow("Archiving");
                operationWindow.OnFinish += (o, args) =>
                {
                    operationWindow.Close();
                    UpdatePanels();
                };
                List <Item> items = (_isFirstFocused ? FirstPanel : SecondPanel).Items.Cast <Item>()
                                    .Where(item => item.IsChecked).ToList();
                if (items.Count < 1)
                {
                    return;
                }
                operationWindow.Show();
                operationWindow.Archive(items[0], destination);
            }
        }