protected virtual void OnRemoveFilterButtonClicked(object sender, System.EventArgs e)
        {
            TreeIter iter;

            if (!filterTreeView.Selection.GetSelected(out iter))
            {
                return;
            }

            RssFilter filter = (RssFilter)filterTreeView.Model.GetValue(iter, 0);

            controller.RemoveFilter(filter);
            filterListStore.Remove(ref iter);
            logger.Debug("Removed row from ListStore");
        }