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
public void modifyText( ModifyEvent e )
			{
				validate( );
			}
		} );
		if ( isRef )
		{
			txtDisplayName.setEnabled( false );
			cmbType.setEnabled( false );
			txtExpression.setEnabled( false );
		}
	}
	private void createMessageSection( Composite composite )
	{
		messageLine = new CLabel( composite, SWT.NONE );
		GridData layoutData = new GridData( GridData.FILL_HORIZONTAL );
		layoutData.horizontalSpan = 3;
		messageLine.setLayoutData( layoutData );
	}
	private void verifyInput( )
	{
		if ( isRef
				&& ( cmbName.getText( ) == null || cmbName.getText( )
						.equals( "" ) ) )
		{
			dialog.getOkButton( ).setEnabled( false );
			return;
		}
		if ( txtName != null
				&& ( txtName.getText( ) == null || txtName.getText( )