Bug 145698 Name change won't enable "restore property" button
Steps to reproduce: 1.New a report, extends lib.label 2.Choose the label, switch to property editor, chang its name to "aa" 3.Choose the label again Expected result: "Restore property" button is enabled Actual result: "Restore property" button is grayed out
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/GroupElementHandle.java
{
	/**
	 * Default constructor.
	 */
	public GroupElementHandle( )
	{
	}
	/**
	 * Returns the list that contains the group of design elements. Contents of
	 * it is <code>DesignElementHandle</code>
	 * 
	 * @return the list that contains the group of design elements.
	 */
	abstract public List getElements( );
	/**
	 * Returns the module.
	 * 
	 * @return the module
	 */
	abstract public Module getModule( );
	/**
	 * Returns the handle of module.
	 * 
	 * @return the handle of module
	 */
	abstract public ModuleHandle getModuleHandle( );
	/**
	 * Indicates that if the given elements are of the same definition. Elements