Bug 184877 [CommonNavigator] No F1 help for Project Explorer view
Build: I20070501-0010 1) Open the Project Explorer view 2) Hit F1 -> There is no help available for this view.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonNavigator.java
/**
	 * <p>
	 * Updates the title text and title tool tip. Called whenever the input of
	 * the viewer changes.
	 * </p>
	 */
	protected void updateTitle() {
		if (commonViewer == null) {
			return;
		}
		Object input = commonViewer.getInput();
		String viewName = getConfigurationElement().getAttribute("name");  
		
		if (input == null) {
			setPartName(viewName);
			setTitleToolTip("");  
		} else {
			String inputToolTip = getFrameToolTipText(input);
			setPartName(viewName);
			setTitleToolTip(inputToolTip);
		}
	}
	/**
	 * <p>
	 * Returns the tool tip text for the given element. Used as the tool tip
	 * text for the current frame, and for the view title tooltip.
	 * </p>
	 */
	protected String getFrameToolTipText(Object anElement) {
		if (commonViewer != null) {