Fair points, but the standard way to do these would be: 1. the data dropdown should be greyed out when it becomes inactive 2. 'x' usually implies cancel. It'd

Fair points, but the standard way to do these would be: 1. the data dropdown should be greyed out when it becomes inactive 2. 'x' usually implies cancel. It'd be better to have 'ok' and 'cancel' buttons at the bottom of the dialog.