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
{
		
		
		
		saveState = 0;
	}
	/**
	 * Close this module.
	 */
	public void close( )
	{
		isValid = false;
		if ( !isReadOnly( ) )
		{
			saveState = activityStack.getCurrentTransNo( );
			session.drop( this );
		}
	}
	/**
	 * This method is not supported in report design.
	 * 
	 * @return Object the cloned report design element.
	 * 
	 * @see java.lang.Object#clone()
	 */
	public Object doClone( CopyPolicy policy )
			throws CloneNotSupportedException
	{
		Module module = (Module) super.doClone( policy );