Submitting a Grade for a Backup Should Just Refresh the Page

[epai]

When you submit a grade on the backup page, it takes you to the grading queue page, which is annoying. It would be nicer if instead the page refreshed; that way you could easily check if the score registered correctly instead of having to go back and manually refresh the page.

[Sumukh]

This was done for composition queues. If you are grading a composition queue -> you want to go to the next one.

If you don't have a composition queue for this assignment - then yes, we shouldn't send you to some random page.