Bug 55592 [Contributions] SubActionBars does not properly handle menu listeners
bundles/org.eclipse.jface/src/org/eclipse/jface/action/SubMenuManager.java
* @see org.eclipse.jface.action.IContributionItem#fill(org.eclipse.swt.widgets.CoolBar, int)
	 */
	public void fill(CoolBar parent, int index) {
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.action.IContributionItem#fill(org.eclipse.swt.widgets.Menu, int)
	 */
	public void fill(Menu parent, int index) {
		if (isVisible())
			getParentMenuManager().fill(parent, index);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.action.IContributionItem#fill(org.eclipse.swt.widgets.ToolBar, int)
	 */
	public void fill(ToolBar parent, int index) {
		if (isVisible())
			getParentMenuManager().fill(parent, index);
	}
	/* (non-Javadoc)
	 * Method declared on IContributionManager.
	 *
	 * Returns the item passed to us, not the wrapper.
	 * In the case of menu's not added by this manager,
	 * ensure that we return a wrapper for the menu.
	 */
	public IContributionItem find(String id) {
		IContributionItem item = getParentMenuManager().find(id);
		if (item instanceof SubContributionItem)
			
			item = unwrap(item);