Fixed nested bullets to enable PDF

4 levels of bullets don’t work with latex

DOC-250
Updating ora2 requirements
Improve inline discussion UI

1. Add space between threads
2. Change Show/Hide to Expand/Collapse and visually separate it
3. Limit a thread to 700px high and scroll if longer

Co-authored-by: marco <marcotuts@gmail.com>
Fixes LMS-2474 by ensuring that readElts reads always reads an element
Merge pull request #3159 from edx/sanchez/ora2-deploy

Updating ora2 requirements
Emit datadog events for all course enrollments, not just those outside of verified courses
Merge pull request #3110 from edx/gprice/inline-visual-fixup

Improve inline discussion UI
Merge pull request #3134 from edx/dcs/a11y-gentle-alert

Fixes LMS-2474 by ensuring that readElts reads always reads an element
Merge pull request #3157 from edx/markhoeber/documentation/PDF-fix

Fixed nested bullets to enable PDF
Merge pull request #3158 from cpennington/enrollment-metrics

Emit datadog events for all course enrollments, not just those outside of verified courses
HD control is disabled initially. It eventually gets enabled on first play of video, when player.getAvailableQualityLevels returns on non-empty array. [BLD-937]
Addressed comments.
Hide HD button on initialization instead of disabling. Show it if HD available instead of enabling.
Addressed comments. Fixed failing tests.