String "Error, no options to show" is not localized

[sypets]

powermail/Classes/Domain/Model/Field.php: $string = 'Error, no options to show';

This is displayed if a select field is empty:

Also, IMHO, this should have an empty value (so it is not possible to select this if the field is mandatory, which would make sense).

powermail/Classes/Domain/Model/Field.php: $string = $localizedString . '|';

(in some cases where the fields are populated automatically, the select might be empty)