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
new Object[]{
								txtName.getText( )
							} ) );
					this.messageLine.setImage( PlatformUI.getWorkbench( )
							.getSharedImages( )
							.getImage( ISharedImages.IMG_OBJS_ERROR_TSK ) );
					return;
				}
			}
		}
		this.messageLine.setText( "" ); 
		this.messageLine.setImage( null );
		if ( txtExpression != null
				&& ( txtExpression.getText( ) == null || txtExpression.getText( )
						.trim( )
						.equals( "" ) ) ) 
		{
			if ( dialog.getOkButton( ) != null )
			{
				dialog.getOkButton( ).setEnabled( false );
				return;
			}
		}
		if ( cmbDataField != null
				&& ( cmbDataField.getText( ) == null || cmbDataField.getText( )
						.trim( )
						.equals( "" ) ) && cmbDataField.isEnabled( ) ) 
		{
			if ( dialog.getOkButton( ) != null )
			{