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
* <li>
	 * <p>
	 * Link with editor support. Allows the user to toggling linking the current
	 * selection with the active editors.
	 * </p>
	 * <li>
	 * <p>
	 * Collapse all. Collapses all expanded nodes.
	 * </p>
	 * <li>
	 * <p>
	 * Select Filters. Provides access to the "Select Filters" dialog that
	 * allows users to enable/disable filters and also the Content Extension
	 * activations.
	 * </p>
	 * </ul>
	 * 
	 * @return The Action Group to be associated with the Common Navigator View
	 *         Part.
	 */
	protected ActionGroup createCommonActionGroup() {
		return new CommonNavigatorActionGroup(this, commonViewer, getLinkHelperService());
	}
	/**
	 * @return The initial input for the viewer. Defaults to
	 *         getSite().getPage().getInput()
	 */
	protected IAdaptable getInitialInput() {
		return getSite().getPage().getInput();
	}