Move get_grades management command from student to grades app

This reverts commit 4dc744b1.

SQL model for course grades

single form element per capa problem

TNL-5402

Introduce id verification step for proctored exams

TNL-5083

Revert "Have DiscussionXBlock take care of loading assets it depends on"

Includes unit tests
For TNL-5310

[SOL-1612] Add DnDv2 to advanced problems; relabel DnDv1 as deprecated

[TNL-5709] Mark a test as flaky

Persistent Grades Flag multiple entries per course

add new unit title and renew bookmark button

With this change, it is now possible to enable and disable the feature for a
particular course as many times as desired. Fix confirmed locally.

TNL-5698

cohort help tests

Updated `compute_grades` command for Django 1.8

Flaky test annotations 2016

new bookmark button placement and look TNL-5625

Fix the wrong target.src for annotations

Fix flaky test test_easy_access_from_notes_page

TNL-4590

Removing Scored/has_score from randomized content block

Masquerade should not apply to user dropdown

Have DiscussionXBlock take care of loading assets it depends on

Merge pull request #13538 from edx/ahsan/ECOM-4641-Invalidate-all-access-tokens-refresh-tokens-on-password-reset

Invalidate access token

WL-611: Fix "Access Denied" when downloading report

* Add openedx.core.lib.xblock_builtin.get_css_dependencies and get_js_dependencies,
  which respect PIPELINE_ENABLED setting when determining dependencies.
* Move new discussion-related Sass files into discussion subdirectory.
* Use "load_unicode" instead of "render_template" to load JS to add to fragment for DiscussionXBlock.
* Remove unused "course" parameter from context for DiscussionXBlock.student_view.
* Add RTL stylesheet for DiscussionXBlock, and enable the block to load correct stylesheet.
* Load MathJax only once, and include code for configuring MathJax in discussion bundle.
* Make sure username renders correctly in DiscussionXBlock response header.
* Move WYSIWYIG Markdown editor styles to _build-discussion.scss.
* Remove unnecessary import of discussion/utilities/v1-compatibility from _build-discussion.scss.
* Keep courseware-chromeless.html in sync with courseware.html.
* Load CSS for discussions on Teams tab.  This makes it possible to remove CSS for discussions from Sass files for "Course" tab.
* Load js/src/tooltip_manager.js, jquery.autocomplete.js and jquery.autocomplete.css on "Course" tab.

ECOM-4641

The annotation.target.src was assigned to a function instead of a string
because the missing brackets.

TNL-5643:
    test_lms_courseware:ProctoredExamTest.test_timed_exam_flow
TNL-4132:
    test_lms_matlab_problem:MatlabProblemTest.test_run_code
TNL-5582:
    test_studio_course_info.UsersCanAddUpdatesTest.test_delete_course_update
TNL-5691:
    test_account_settings.AccountSettingsPageTest.test_full_name_field