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
stack.execute( addRecord );
			
			
			addElementNames( content );
			
			
			if ( content instanceof GroupElement )
			{
				module.makeUniqueName( content );
			}
		}
		catch ( NameException e )
		{
			stack.rollback( );
			throw e;
		}
		stack.commit( );
	}
	/**
	 * Determines if the slot can contain a given element with considering the
	 * context.
	 * 
	 * @param slotId
	 *            the slot id
	 * @param element
	 *            the element to insert
	 * @throws NameException
	 *             if name duplicate occurs
	 * @throws ContentException