MDL-41251 forum_mod: add aria label and role to forum discussion page for accessibility purpose.
Thanks to Nate Baxley for creating the original patch.
MDL-42542 portfolio: Fix handlerfile in portfolio event handler
MDL-42284 core_message: adding behat tests for viewing message history MDLQA-135
MDL-42574 blocks: Fix strict standards warning in community block
MDL-41232 revert IE8 fix for solving unspoken filemanager details on View List selection
MDL-41337 files: Fixed bug with accidental delete of the root directory
MDL-40683 fix user upload form validation problem
Merge branch 'MDL-41232-master' of git://github.com/mouneyrac/moodle
Merge branch 'MDL-42542-master' of git://github.com/FMCorz/moodle

Conflicts:
	version.php
Merge branch 'wip-MDL-41337-master' of git://github.com/marinaglancy/moodle
MDL-42579 Glossary: Fix debug notice from missing name fields.
Merge branch 'MDL-42579_m26_2' of git://github.com/sbourget/moodle
Merge branch 'MDL-41251_c' of git://github.com/rwijaya/moodle
Merge branch 'MDL-42574-master' of git://github.com/ankitagarwal/moodle
Merge branch 'MDL-42284_behat' of https://github.com/andyjdavis/moodle
MDL-42589: Fix file picker display in ie9/ie10

CSS change to fix blank file picker bug in IE.