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
* are identified by a container ID.
	 * 
	 * @param from
	 *            the old element to replace
	 * @param to
	 *            the new element to replace
	 * @param slotID
	 *            the slot from which to replace the old element
	 * @param unresolveReference
	 *            status whether to un-resolve the references or set the
	 *            reference to null
	 * @throws SemanticException
	 *             if the old element cannot be replaced by the new element into
	 *             this container.
	 */
	public void transformTemplate( DesignElement from, DesignElement to,
			int slotID, boolean unresolveReference ) throws SemanticException
	{
		doReplace( from, to, slotID, unresolveReference );
	}
	/**
	 * @see #transformTemplate(DesignElement, DesignElement, int, boolean)
	 * 
	 * @param oldElement
	 *            the old element to replace
	 * @param newElement
	 *            the new element to replace
	 * @param slotID
	 *            the slot from which to replace the old element
	 * @param unresolveReference