Bug 213822 [Regression]Can not save the modification of group in Aggregation builder
Description: [2.2.2]Can not save the modification of group in Aggregation builder Build number: 2.2.2.v20071225-0630 Steps to reproduce: 1, New a table with two groups 2, Insert a aggregation builder in group footer 3, Select the first group and click OK 4, Open the builder again and modify the group to group2 Expected result: The modification can be saved Actual result: The modification takes no effect and the report design has no dirty mark after the modification. Error log:
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
gd = new GridData( GridData.FILL_HORIZONTAL
					| GridData.GRAB_HORIZONTAL );
			gd.horizontalSpan = 2;			
			txtName.setLayoutData( gd );
			txtName.addModifyListener( new ModifyListener( ) {
				public void modifyText( ModifyEvent e )
				{
					validate( );
				}
			} );
		}
		new Label( composite, SWT.NONE ).setText( DISPLAY_NAME );
		txtDisplayName = new Text( composite, SWT.BORDER );
		txtDisplayName.setLayoutData( gd );
		new Label( composite, SWT.NONE ).setText( DATA_TYPE );
		cmbType = new Combo( composite, SWT.BORDER | SWT.READ_ONLY );
		cmbType.setLayoutData( gd );
		if ( isAggregate( ) )
		{
			createAggregateSection( composite );
		}
		else
		{
			createCommonSection( composite );
		}
		createMessageSection( composite );
	}
	public void initDialog( )
	{
		if ( isCreate )