Pre-fill question type combined feedback

There are a few question types that involve selecting multiple responses and these have a combined feedback section.
pre-fill 'For any correct response' with "Your answer is correct."
pre-fill 'For any partially correct response' with 'Your answer is partially correct'
pre-fill 'For any incorrect response'with "Your answer is incorrect".

Handling different languages
Use the standard approach with languages. English only handled initially. The pre fill value will be supplied through the standard Moodle language files.

The reason for the pre fill example is that the size of the text boxes implies too much information is needed. The hint gives a better example. It also means we can reduce the size of the text box.

The only change required is in adding the pre fill hint. If the hint is not changed before the question type is saved the hint text will be saved as the appropriate response.