MDL-48235 mod_assign: Fix reopen until pass behavior
MDL-36673 mod_lesson: slideshow mode not working
MDL-48347 gradebook: Single view shows all grade items.

Manual grade items, course totals, and categroy totals
were not being displayed in the single view.
MDL-48169 themes: extra upgrade notes
MDL-48347 gradebook: More behat tests for single view.
MDL-48547 thirdparty: remove incorrect entry
MDL-48556 backup: Use correct conditions before checking dir permissions
MDL-45324 assign: notify when workflow is Off, or if state is Released

When marking workflow is enabled, students will be notified only when
the workflow state transitions to 'Released'. Until that happens,
sending of messages will be held and the 'Notify students' grading
form option will be locked.

Additionally, the batch set marking workflow state facility gains
the 'Notify students' option.

Credit to Steve Upton and David Balch for the basis of this patch.
MDL-47037 grader_gradereport: Enable sort in other language then English
MDL-48567 core_badges: fixed display of badge created date
MDL-46491 course: Correct activity visibility on section show
MDL-48473 mod_lesson: fill in the blank shortanswer option
MDL-48473 mod_lesson: test fill in the blank question
MDL-48569 profile: show link to full profile if anybody can see it
MDL-48569 profile: behat test for user full profile access
MDL-38128 mod_assign: Adding group selector to grading summary page

Thanks to Pau Ferrer Ocaña and Avi Levy for
their work on this issue.
MDL-38128 mod_assign: Fixing count teams and submissions with status

We should restrict the groups to the activity active group. Also
improving performance caching get_submission_group() results.
MDL-46472 theme: Removing standard as an uninstallable theme
MDL-38128 mod_assign: Counts and groups unit tests
MDL-47176 qtype_match: Avoid sql_compare to solve problems with Oracle