private void EditNotification_Click(object sender, RoutedEventArgs e)
 {
     if (NotificationListView.SelectedItem != null && ((Notification)NotificationListView.SelectedItem).Recipients.Contains("ALL_USERS"))
     {
         Notification           initialNotification = _notificationController.GetOne(((Notification)NotificationListView.SelectedItem).ID);
         EditNotificationWindow window = new EditNotificationWindow(this, initialNotification);
         window.Show();
     }
 }