MDL-45290 rubrics: overflow, delete button alignment

Adjusted delete button alignment, restored overflow rule, amended button alignment, minor RTL fixes.
MDL-45421 report_eventlist: Changed sorting of event name column to sort by event name.

It was sorting by the full event path previous to this.
Merge branch 'MDL-45290-master-fix' of https://github.com/jethac/moodle
MDL-44606 assign: disable sesskey protection for unit test.
Merge branch 'wip-MDL-45421-master' of git://github.com/abgreeve/moodle
Merge branch 'MDL-44606-master' of http://github.com/damyon/moodle
MDL-43877 blocks: Files from blocks in my/ were accessible to the world
MDL-45371 behat: Tests for block glossary_random