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
catch ( SemanticException e )
		{
			stack.rollback( );
			throw e;
		}
		stack.commit( );
	}
	/**
	 * Does some actions when the content is removed from the design tree.
	 * 
	 * @param content
	 *            the content to remove
	 * @param unresolveReference
	 *            status whether to un-resolve the references
	 * @throws SemanticException
	 */
	private void doDelectAction( DesignElement content,
			boolean unresolveReference ) throws SemanticException
	{
		
		removeContents( content );
		
		dropUserProperties( content );
		if ( content.hasReferences( ) )
			adjustReferenceClients( (ReferenceableElement) content,
					unresolveReference );
		adjustReferredClients( content );
		adjustDerived( content );
		
		if ( content.getStyle( module ) != null )