Bug 198971 [CommonNavigator] Provide extension schema for setting help ID
I haven't been able to find a way to set the help ID for a view using the common resource navigator. It seems that having schema support for this would be the best way to handle this.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/INavigatorViewerDescriptor.java
* "Available Extensions" tab in the "Available Customizations" dialog
	 * should not be available for the user (defaults to <b>false</b>).
	 * 
	 */
	String PROP_HIDE_AVAILABLE_EXT_TAB = "org.eclipse.ui.navigator.hideAvailableExtensionsTab"; 
	/**
	 * {@value} (boolean): True
	 * indicates the entire "Available Customizations" dialog should not be
	 * available for the user (defaults to <b>false</b>).
	 */
	String PROP_HIDE_AVAILABLE_CUSTOMIZATIONS_DIALOG = "org.eclipse.ui.navigator.hideAvailableCustomizationsDialog"; 
	/**
	 * {@value} (boolean): True indicates the
	 * "Collapse All" button should not be available for the user (defaults to
	 * <b>false</b>).
	 */
	String PROP_HIDE_COLLAPSE_ALL_ACTION = "org.eclipse.ui.navigator.hideCollapseAllAction"; 
	/**
	 * {@value} (boolean): True indicates
	 * the "Link With Editor" action should not be available for the user
	 * (defaults to <b>false</b>).
	 */
	String PROP_HIDE_LINK_WITH_EDITOR_ACTION = "org.eclipse.ui.navigator.hideLinkWithEditorAction"; 
	/**
	 * Returns the id of the viewer targeted by this extension.
	 * 
	 * @return the id of the viewer targeted by this extension.
	 */
	String getViewerId();
	/**