Allow the page size in the Single view report to be configurable or remove pagination

Start with a course with some gradeable activities + a large number of users (more than 100) View the 'single view' grade report (on a course: Navigation > My courses > [coursename] > Grades; select 'Single view' from the drop-down) Select a grade item to view Choose the number of grades to display per page Confirm the expected number of user grades are shown and that the paging works as expected Navigate away from the page Navigate back to the grading page Confirm that the number of items per page has been remembered Log out + back in again Navigate back to the grading page Confirm that the number of items has reset back to the default (100 items)