Bug 262606 [CommonNavigator] Up button after "go into" has bad tooltip text
I20090127-0100 1) Select a Java project 2) right-click, select "Go Into" 3) Hover over the Up button, the tooltip text is impressive
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonNavigator.java
};
		commonViewer.getNavigatorContentService()
				.getSaveablesService().init(this, getCommonViewer(),
						saveablesLifecycleListener);
		
		commonViewer.addSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				firePropertyChange(PROP_DIRTY);
			}});
		
	      PlatformUI.getWorkbench().getHelpSystem().setHelp(commonViewer.getControl(),  HELP_CONTEXT);
	}
	/**
	 * <p>
	 * Updates the title text and title tool tip. Called whenever the input of
	 * the viewer changes.
	 * </p>
	 * @since 3.4
	 */
	public void updateTitle() {
		Object input = commonViewer.getInput();
		if (input == null) {
			setTitleToolTip(""); 
		} else {
			String inputToolTip = getFrameToolTipText(input);
			setTitleToolTip(inputToolTip);
		}
	}
	
	/**