MDL-46643 calendar: improved tab order of calendar detail pages
MDL-46315 themes: Fixed display inconsistancy with help modals
MDL-46646 course: regression in behat tests

Newly introduced unit tests are failing because the timestamps used are
too large.  Example timestamps were 11 characters long instead of 10.
MDL-46565 gradereport_*: renamed report classes to match parent
MDL-46600 core_grades: made it explicit in the error message that a failed grade import means nothing was imported.
MDL-46470 bootstrapbase: support linkedwhenselected attribute for tabs
MDL-46697 gradebook: Only count active users when needed (and only id)

The code only needs the id column to perform its count. On courses with a lot of users
fetching the whole user record for them all easily adds up to several hundred MB of
memory.
MDL-46676 profilefield_datetime: Use moodle time API
MDL-46448 core_rating: now only formats rating aggregate if user can see it
MDL-46561 session: use full session validation in \core\session\manager::session_exists()
MDL-21042 report_security: don't display warning for riskbackup unnecessarily
MDL-46681 qtype_multichoice: disabled unused options

For questions set to 'One answer only', the 'Clear incorrect responses'
and 'Show the number of correct responses' hint options make not sense,
and are not used. Hence we disableIf them.
MDL-46480 fix get_htmlelement_size() to deal with hidden or non-block elements
MDL-46718: Return user to last accessed page when quick grading
MDL-45642 questions: add required index to question_attempts.

It is important to be able to tell which behaviours are in use, and
without this index, it requires a complete scan of this table, which can
be very big, to verify that a behaviour is unused.
MDL-46308 qformat_xml: fix import of broken calculated questions.

Questions like this should not exist, of course. But they do, so we
should avoid generating errors in this case.
MDL-37401 mod_scorm : autocommit for scorm
MDL-46660 muc: add env check to memcache driver
MDL-43740 core_grade: Thanks for Robert Russo for the patch. Removed the ability to set manual grade items to grade type "None"
MDL-43824 core/grade/report/grader: Fix for misalignment of static rows with scale grades.