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
{
		if ( left == right )
			return true;
		if ( left == null )
			return "".equals( right );
		if ( right == null )
			return "".equals( left );
		return left.equals( right );
	}
	private String getDataType( )
	{
		for ( int i = 0; i < DATA_TYPE_CHOICES.length; i++ )
		{
			if ( DATA_TYPE_CHOICES[i].getDisplayName( )
					.equals( cmbType.getText( ) ) )
			{
				return DATA_TYPE_CHOICES[i].getName( );
			}
		}
		return "";
	}
	public ComputedColumnHandle editBinding( ComputedColumnHandle binding )
			throws SemanticException
	{
		if ( isRef )
			return getBindingColumn( );
		if ( isAggregate( ) )
		{
			binding.setDisplayName( txtDisplayName.getText( ) );
			for ( int i = 0; i < DATA_TYPE_CHOICES.length; i++ )