Right now, it is possible to set up an additional “bonus grade”, where anything between 0 and 10 (or even outside that range) can be entered during grading.
However, for A&D assignments, we wish to give a pre-define a penalty (e.g. always deduct 5 points) if they do not meet the requirements (e.g. use a library sort method, while they had to implement sorting themselves).
For these situations, it would be easier if the penalty was modeled as a check-box.

This is related to #636 (Assign graders should also work when only additional grade is used).

Submitted by Maarten Sijm on 19 March 2018 at 15:46