gtk_recent_chooser_set_filter (GTK_RECENT_CHOOSER (toolbar_recent_menu), filter);
tool_item = GTK_WIDGET (gtk_menu_tool_button_new_from_stock (GTK_STOCK_OPEN));
gtk_recent_chooser_set_filter (GTK_RECENT_CHOOSER (toolbar_recent_menu), filter);
tool_item = GTK_WIDGET (gtk_menu_tool_button_new_from_stock (GTK_STOCK_OPEN));