Studio: Course Outline Static Rendering/Styling

This work provides some rendering support of the bulk publishing-related course outline changes.
When we reviewed this in person last week, this semantic class naming around lists seemed okay.

If its going to be troublesome, we can definitely figure out a more flexible naming convention, but I want to avoid going back to the "list-sortable" original classes. I've looked through my Sass/CSS and my references to the list elements that contain outline elements are minimal, but I do need some sort of differentiator for subsection and unit lists (to add vertical spacing between them and their parents).