UI/UX: teachers need to see the latest version of a course

Problem/Motivation

When a teacher or admin is editing a course, they need to be able to view and assess their changes from a student's perspective. However, teachers are currently subject to the same revision-locking as students, so any new revisions are not shown to them if they revisit a course.

This means a teacher needs to manually reset their course progress every time they want to see the updates they've made. This is a pain point because they have to go through a multi-step process each time: visit the course's front-end page, go to the Students tab, find and select their username, reset progress, confirm, return to the course page, and click Start.

Proposed resolution

One option would be to modify the revision reference field to dynamically bypass the revision lock for course editors. This would need to be context aware, so as not to break the grading workflow. This seems like it would be challenging to implement, and the teacher's CourseStatus and LessonStatus would have to be updated to reflect the latest revisions, which could end up being a data integrity nightmare.

A cleaner option would be to simplify the process of resetting course progress. A 1-click "Reset" button visible only to LMS teachers & admins would allow them to see the latest revisions, and only when they want to. The best spot to add a Reset button seems like it would be in the navigation block, since that will already be on-page when they want to update the course.

We should also grant course editors implicit Free Navigation, so they can check any activity regardless of the navigation settings.