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
module.activityStack = new ActivityStack( );
		module.allExceptions = null;
		module.attributeListeners = null;
		module.disposeListeners = null;
		module.elementIDCounter = 1;
		module.fatalException = null;
		module.idMap = new HashMap( );
		module.moduleNameSpaces = new IModuleNameSpace[NAME_SPACE_COUNT];
		module.nameSpaces = new NameSpace[NAME_SPACE_COUNT];
		module.nameManager = new NameManager( module );
		module.referencableProperties = null;
		module.saveState = 0;
		module.systemId = null;
		module.translations = (TranslationTable) translations.clone( );
		module.validationExecutor = new ValidationExecutor( module );
		module.validationListeners = null;
		assert module.getID( ) > NO_ID;
		assert module.getElementByID( module.getID( ) ) == null;
		module.addElementID( module );
		
		for ( int i = 0; i < NAME_SPACE_COUNT; i++ )
		{
			module.nameSpaces[i] = new NameSpace( );
			module.moduleNameSpaces[i] = ModuleNameScopeFactory
					.createElementNameSpace( module, i );
		}
		
		if ( theme != null )
			module.theme = new ElementRefValue( theme.getLibraryNamespace( ),
					theme.getName( ) );