public void RemoveNotification(Notification notification)
        {
            if (Notifications.Contains(notification))
            {
                Notifications.Remove(notification);
            }

            if (_buffer.Count > 0)
            {
                Notifications.Add(_buffer[0]);
                _buffer.RemoveAt(0);
            }

            //Close window if there's nothing to show
            if (Notifications.Count < 1)
            {
                Hide();
            }
        }