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
{
		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++ )