The filetypes form element has two lables, one of which is broken

This is easiest to reproduce in th essay question type form:

1. Create a course and go to the question bank.
2. Create a new essay question type
3. Expected:There should only be one "Accepted file types" label for that input element.
4. Actual: there are two, one of which as no for="" attribute.

This can also be reproduced anywhere this element type is used, if you are accessing Moodle using a screen-reader.