Bug 145520 Group name will not show up in group list if the group use default name and key expression has no value
Description: Group name will not show up in group list if key expression has no value. Steps to reproduce: 1. Insert a table into report, bind it to a data set 2. Switch to property editor -> groups 3. Click on add button to open new group dialog, then press ok button Expected result: A new group with default name will be added to group list Actual result: A new group is added to group list, but without group name. But when let group tab lost focus and get focus again, you can see the group name.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
.getModuleNameSpace( Module.THEME_NAME_SPACE );
		ElementRefValue refValue = resolver.resolve( ReferenceValueUtil
				.needTheNamespacePrefix( theme, this ), null );
		Theme target = null;
		if ( refValue.isResolved( ) )
		{
			target = (Theme) refValue.getElement( );
			theme.resolve( target );
			target.addClient( this, THEME_PROP );
		}
		return target;
	}
	/**
	 * Resets the element Id for the content element and its sub elements.
	 * 
	 * @param element
	 *            the element to add
	 * @param isAdd
	 *            whether to add or remove the element id
	 */
	public void manageId( DesignElement element, boolean isAdd )
	{
		if ( element == null )
			return;
		
		if ( element.getRoot( ) != this )
			return;
		IElementDefn defn = element.getDefn( );
		if ( isAdd )
		{