When on the grading page (mod/assign/view.php?id=NNNNN&action=grader&userid=NNNNN) there are two filter settings

1. in the dropdown menu, to
2. Reset table preferences

The* Reset table preferences* goes back to the grade overview page (mod/assign/view.php?id=NNNNN&action=grading), but that is not very clear to the users. And in any case it is not clear in what way it affects the current view.

Discussion in forums: https://moodle.org/mod/forum/discuss.php?d=465640
It might tie in to this issue: https://tracker.moodle.org/browse/MDL-67719