Apply code review comments and fix tests
Correct publish titles, code review feedback.
Studio: addressing outline UI PR feedback:

* correcting visual display of outline UI without content
* temporarily resolving page actions that should be hidden by default
Add test fixes and fix expand collapse behavior
Stop propagation of clicks in XBlockStringFieldEditor
Fix collapsed subsections expanding when creating or deleting subsections
Prevent clicking in display name textbox from toggling expand collapse
Add test for published title when not live
Studio: further outline UI revisions + PR feedback

* syncing up status-release hover states for outline units
* adjusting in-context editor UI for longer outline titles
* corrects outline incontext editor display regression
* cleaning up unit/container sidebar styling
* removing redundant margin on Outline UI subsections
* selecting text when a user focuses into an incontext-editor input - STUD-2032
Include edited/published_by for container page only
Add tests for course outline warning messages

Fix failing bokchoy tests
Fix delete messages in course outline
STUD-2019
Reduce calls to expensive methods in create_xblock_info

Special-case the outline page requests.

STUD-1997
Reduce parent/child lookups in create_xblock_info

STUD-1997
Edit section/subsection release dates and grading types.

Fix bok_choy test by changing course separator.
Change format of the modal title to '[Subsection/Section Name] Settings'.
Improve bok_choy test stability.
Studio: correcting modal window size name for outline settings editor
Specify full date in bok_choy tests.
Refactor bok_choy tests.
Remove .modal-editor from basic-modal.underscore
Set classes in modal window dynamically.
Studio: revising outline edit modal tip content and overall size
Rename isEditable to isEditableOnCourseOutline.
Interpolate display name.
Use graded instead of format as flag.
Studio: revising outline settings edit modal size
Fix selectors in bok_choy tests.
Fix rebase issue.
STUD-2021: Fix Multiple Choice Options in Studio.
Fix Group Configuration Page after rebase.
Drag and drop support on the course outline page.
Studio: re-implemeting visual styling for drag and drop:

* adding back in drag and drop indicators to outline DOM
* correcting visual display of drag action in outline UI
* adjusting styling of outline drag and drop indicators
* adjusting styling of drag and drop was-dropped state
resolving mid-drop unit marign issue in Firefox
Increase "fudge" factor for dragging to top of list with only 1 element.
Remove code and template responsible for subsection edit page
styling for unit location module on container page