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/command/ContentCommand.java
{
			throw new ContentException( element, slotID,
					ContentException.DESIGN_EXCEPTION_SLOT_IS_FULL );
		}
		if ( slotID == Module.COMPONENT_SLOT )
		{
			if ( StringUtil.isBlank( content.getName( ) ) )
				throw new ContentException( element, slotID, content,
						ContentException.DESIGN_EXCEPTION_CONTENT_NAME_REQUIRED );
		}
		checkContainmentContext( slotID, content );
		
		ContentRecord addRecord;
		if ( newPos == -1 )
		{
			addRecord = new ContentRecord( module, element, slotID, content,
					true );
		}
		else
		{
			addRecord = new ContentRecord( module, element, slotID, content,
					newPos );
		}
		ActivityStack stack = getActivityStack( );
		stack.startTrans( addRecord.getLabel( ) );
		try
		{
			
			TemplateCommand cmd = new TemplateCommand( module, element );
			cmd.checkAdd( content, slotID );