Bug 152412 [Smoke]Insert,delete a master page, can not take effect
Insert,delete a master page, can not take effect Steps: 1.new a report 2.open outline view, insert a master page or delete a master page Actual Results 1.Can not take effect.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/parts/event/ModelEventManager.java
*/
	private boolean isPost = false;
	private List listenerList = new ArrayList( );
	
	/**
	 * To add the listener to the all model element.
	 */
	private ListenerElementVisitor visitor;
	
	/**
	 * The root, It must not a mudulehandle
	 */
	private Object root;
	
	/**
	 * To listener the model trans status.(Commit or Roll back)
	 */
	private ActivityStackListener commandStackListener = new ActivityStackListener( ) {
		public void stackChanged( ActivityStackEvent event )
		{
			postEvent( event );
		}
	};
	/* (non-Javadoc)
	 * @see org.eclipse.birt.report.model.api.core.Listener#elementChanged(org.eclipse.birt.report.model.api.DesignElementHandle, org.eclipse.birt.report.model.api.activity.NotificationEvent)
	 */
	public void elementChanged( DesignElementHandle focus, NotificationEvent ev )
	{
		List temp = new ArrayList(listenerList);
		int size = temp.size( );