decimal Separator other than "." does not work! (Typo in title of post, could not change the title afterwards!)

If I use a NumberField and set the decimal separator to a comma ("," - default comma separato in german speaking countries) the getValue() method returns null, as "1,5" is not accepted by the NumberPropertyEditor.convertStringToValue method.

The NumberPropertyEditor should respect the decimal separator setting from the NumberField. If so, the validateValue() method in NumberField does not need to replace the decimal separator with a "."!