LMS-2719

This commit implements STUD-1490, allowing creation of components
on the container page. It also enables the delete and duplicate
buttons now that new content can be created that would benefit.

Note that it also creates shared functionality for adding components,
and refactors the unit page to use it too.

Added new error message that displays when HTML5 video is not supported altogether. Make sure spinner gets hidden when error message is shown. [BLD-638]

It was merged by mistake during the code freeze.

LMS-2646

For now, this only includes course id, search terms, and result count.
Information is logged both to the standard logger for near-term analysis
and the event tracker for the longer term. Result count logging requires
commit 02466b1 of cs_comments_service (otherwise it will be null).

sorted the output, easier to read

Add is_active filter to only generate for students enrolled

Adding back total_enrollment

Removing active filter

Certs will generate for all users in the course, not just those "active"

Typo

Renaming headings to make more sense

Renaming variables to match headings

Update annotations modules to use the course_id from the runtime, rather than extracting it from the page