Allow configure maximum late submission penalty

[seekstar]

Currently, the penalty for late submissions can reduce the score to zero. However, I want to limit the maximum penalty to 40% so that students can still get 60% of the full marks as long as they complete the assignment at last.

[jhs-panda]

Hi! Thanks for the feature request, we'll look into it!
In the meantime, if you would like to limit the maximum penalty, the workaround is to manually adjust students' scores.

In the gradesheet for an assignment, clicking on a student's email and submission history will lead you to their handin history. Clicking Edit under "Instructor Actions" and entering a Tweak number of points or percentage will allow you to increment their score by the tweaked amount.

Sorry for the inconvenience!

[jhs-panda]

Currently, in submission.rb, the apply_late_penalty and apply_version_penalty functions set the score with penalty if it exists. During the calculation, it ensures that the final score is nonnegative.

To implement the feature, we can consider adding a setting that allows the user to set a maximum penalty (0 by default) and pass that variable into the max() function instead of the current value of 0.