MDL-45870 mod_assign: Outcomes are saved for each group member
MDL-35648 adding missing distinct selector in sql on participation report
MDL-44929 Javascript: Import YUI 3.17.2
MDL-45803 mod_quiz: added attempt snapshot for the attempt and preview started events
MDL-45803 mod_quiz: prevented the attempt_started event from being triggered twice
MDL-45611 Questions: Fixing the layout of the 'points box'
MDL-45719 mod_lti - Pass language strings to inline JS to allow for escaping
MDL-42531 assign: refactor batch operations to use forms properly

Avoids a lot of ugly optional_param() use. Also fixes the
non-functional cancel buttons.
MDL-45935 tests: Specify step names during backup/restore tests
MDL-44871 Behat: Add tests for Atto functionalities (some of them)
MDL-45870 mod_assign: Behat test covering some outcome usage
MDL-44871 Atto behat tests: Modified the tests to work around focus bugs with workspaces

The main changes here are that the "select the text in" step was modified to select only the
first text node in the editor field, and to focus on it's parent instead of the entire editable div.

Some tests had to be modified to match the new behaviour, and another "real" bug was found in the table plugin.
MDL-44871 Atto: Move custom select text step to atto specific step definition.
MDL-44871 Atto behat: Use one less page load to get to profile edit page
MDL-44871 behat: Hack to make equation editor visible
MDL-45803 mod_quiz: removed usage of the function quiz_fire_attempt_started_event
MDL-45803 mod_quiz: removed the quiz_fire_attempt_started function

Also commented in mod/quiz/upgrade.txt to inform developers.
Automatically generated installer lang files
MDL-45395 lib: Removal of excel 5 spreadsheet creation files.

The excel 5 writer files were using OLE licensing which is GPL incompatible.
These classes are not used in core.
MDL-44871 Atto: Add missing tags to behat tests @editor and @editor_atto