Bug 146481 Name is not necessary for extended element
Steps to reproduce: 1.New a label named "label" in library 2.New a report, extend lib.label Expected result: No name for the extended label Actual result: "label" is added as the name of label in report. It's not reasonable because "Restore Properties" is enabled even without properties change.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/SimpleGroupElementHandle.java
* @see DesignElementHandle
	 */
	public SimpleGroupElementHandle( ModuleHandle moduleHandle, List elements )
	{
		assert moduleHandle != null;
		module = moduleHandle.getModule( );
		assert elements != null;
		this.elements = elements;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.GroupElementHandle#getElements()
	 */
	public List getElements( )
	{
		return elements;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.GroupElementHandle#getModule()
	 */
	public Module getModule( )
	{
		return module;
	}
	/*
	 * (non-Javadoc)
	 *