private void addExtras(JToolBar toolbar) {
		toolbar.addSeparator();
		toolbar.add(new TooltipAction("Complete",
				"This will finish all expansion.") {
			public void actionPerformed(ActionEvent e) {
				controller.complete();
			}
		});
		toolbar.add(new TooltipAction("Done?", "Are we finished?") {
			public void actionPerformed(ActionEvent e) {
				controller.done();
			}
		});
	}