Bug 210892 [Regression]The arguments of aggregation builder can not be modified
Description: [Regression]The arguments of aggregation builder can not be modified Build number: 2.3.0.v20071126-0800 Steps to reproduce: 1, New a table 2, Drag a aggregation builder into table 3, Specify the datafield, function to percentile and argument to 0.3 4, Reopen the aggregation and change the argument to 0.4 Expected result: After step4, the artument is changed to 0.4 Actual result: Nothing happened after step4, the argument is still 0.3 Error log:
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
txtDisplayName.setLayoutData( new GridData( GridData.FILL_HORIZONTAL
				| GridData.GRAB_HORIZONTAL ) );
		WidgetUtil.createGridPlaceholder( composite, 1, false );
		new Label( composite, SWT.NONE ).setText( DATA_TYPE );
		cmbType = new Combo( composite, SWT.BORDER | SWT.READ_ONLY );
		cmbType.setLayoutData( new GridData( GridData.FILL_HORIZONTAL
				| GridData.GRAB_HORIZONTAL ) );
		WidgetUtil.createGridPlaceholder( composite, 1, false );
		if ( isAggregate( ) )
		{
			createAggregateSection( composite );
		}
		else
		{
			createCommonSection( composite );
		}
		createMessageSection( composite );
	}
	public void initDialog( )
	{
		if ( isCreate )
		{
			if ( isRef )
			{
				if ( getBinding( ) == null )
				{
					for ( Iterator iterator = getBindingHolder( ).getDataBindingReference( )
							.getColumnBindings( )
							.iterator( ); iterator.hasNext( ); )
					{