Author: Jun Pataleta
MDL-67663 mod_forum: Make user switching more accessible
* Add a more descriptive label for the next and previous buttons so that
the users would know that clicking on the next or previous buttons will
save the changes they made before proceeding to the next user.
* Add an sr-only div with aria-live to the user picker to let the grader
know the current user that is being graded.
* Hide the user picture from screen readers
http://git.moodle.org/gw?p=moodle.git;a=commit;h=79d668fc8f077318fe9e884099996610ecdfbf83
http://github.com/moodle/moodle/commit/79d668fc8f077318fe9e884099996610ecdfbf83
+ 3.8 en [nextuser,mod_forum]
+ 3.8 en [previoususer,mod_forum]
+ 3.8 en [nowgradinguser,mod_forum]