MDL-35864  Require 'enrol/PLUGIN:config' capabilities to delete enrol instances
MDL-46159 course: Add search box to course management pages
MDL-45847 resort: Add more course sorting options

MDL-45847 resort: Add more course sorting options

Add descending sort options and course timecreated sort options.
Includes behat and unit test changes.
MDL-46285 core_renderers: optionally hide user_picture from screen readers
MDL-45965 assign: add notification capability

MDL-45965 assign: add notification capability

Adds a new capability that adds flexibility to what users receive grader
submission messages. Includes phpunit tests. Function is based off of
get_graders() but is separate because it is bad form to have a
capability that is dependent on another capabilities setting.
MDL-34248 core_backup: added missing end quotation
MDL-44925 Add SVG output option to TeX notation filter with PNG or MathJax for backup
MDL-40479 mod_assign: Fix the colour of grading success messages.
MDL-40479 mod_assign PHPDoc: Fix error, improve consistency.
MDL-46370 Ajax and Javascript - Fixes docked blocks not expanding when using dock on right
MDL-45594 simplify message_get_recent_conversations SQL

I am pretty sure that this new SQL is logically equivalent to
the original, and it passes Mark's unit tests. However, it is
hard to be 100% sure.
MDL-45594 core_message: ordered recent notifications by timecreated
MDL-45594 core_message: added unit tests
MDL-46406 core_auth: Placed remember username before submit login form
MDL-45339 Libraries: Add a note to docblock of get_config, set_config, and unset_config to note they are used in lib/db/upgrade.php
MDL-45724 cache: admin screen now shows store warnings

Implemented a means by which cache store instance can communicate
warnings due to things such as conflicting configurations etc.
MDL-46335 backup: fixed casting issue with setting labels

The issue was that clean_param took an int and returned a string
and the result was used in an exact comparison.
The type change mean the comparison failed.
The solution was to ensure the param was cast as a string.
enrol_imsenterprise: MDL-46363 including course lib when create_course is
used
MDL-34248 core_backup: used API instead of inserting into the log table directly
MDL-46316 notes: coding style fixes