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/internal/navigator/extensions/NavigatorViewerDescriptor.java
0,
							"Attempt to override custom insertion points denied. Verify there are no colliding org.eclipse.ui.navigator.viewer extension points.", null); 
			return; 
		}
		customInsertionPoints = newCustomInsertionPoints;
	}
	/**
	 * 
	 * @param toAllowPlatformContributions
	 *            A value of 'true' enables object/viewer contributions. 'false'
	 *            will only allow programmatic contributions from
	 *            {@link CommonActionProvider}s.
	 */
	public void setAllowsPlatformContributions(
			boolean toAllowPlatformContributions) {
		allowsPlatformContributions = toAllowPlatformContributions;
	}
	/**
	 * @return the viewer from which this viewer inherits its bindings
	 */
	public String getInheritBindingsFromViewer() {
		return inheritBindingsFromViewer;
	}
	
	/**
	 * @param inherit
	 */
	public void setInheritBindingsFromViewer(String inherit) {
		inheritBindingsFromViewer = inherit;
	}