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
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.GroupElementHandle#getPropertyHandle(java.lang.String)
	 */
	public GroupPropertyHandle getPropertyHandle( String propName )
	{
		List commProps = getCommonProperties( );
		for ( int i = 0; i < commProps.size( ); i++ )
		{
			ElementPropertyDefn propDefn = (ElementPropertyDefn) commProps
					.get( i );
			if ( propDefn.getName( ).equalsIgnoreCase( propName ) )
			{
				return new GroupPropertyHandle( this, propDefn );
			}
		}
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.GroupElementHandle#isInGroup(org.eclipse.birt.report.model.api.DesignElementHandle)
	 */
	protected boolean isInGroup( DesignElementHandle element )
	{
		return elements.contains( element );
	}
}