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
* <p>
	 * 
	 * @return <code>true</code> if the conditions is met.
	 */
	public final boolean hasLocalPropertiesForExtendedElements( )
	{
		if ( !isSameType( ) )
			return false;
		if ( !isExtendedElements( ) )
			return false;
		List elements = getElements( );
		for ( Iterator iter = elements.iterator( ); iter.hasNext( ); )
		{
			DesignElementHandle elementHandle = (DesignElementHandle) iter
					.next( );
			if ( elementHandle.getElement( ).hasLocalPropertyValues( ) )
				return true;
		}
		return false;
	}
	/**
	 * Checks whether a property is read-only in the property sheet. The visible
	 * property is read-only in all <code>elements</code>.
	 * 
	 * @param propName
	 *            the property name
	 * @return <code>true</code> if it is read-only. Otherwise
	 *         <code>false</code>.
	 */
	abstract protected boolean isPropertyReadOnly( String propName );