Author: Jun Pataleta
MDL-61389 mod_forum: Descriptive aria-label for "Discuss this topic"
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0846b4af08512f55d5033f3260491cd5b704200e
http://github.com/moodle/moodle/commit/0846b4af08512f55d5033f3260491cd5b704200e
+ 3.7 en [discusstopicname,mod_forum]