Author: Mihail Geshoski
MDL-35396 lesson: Fix detailed statistics display for essay questions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=29924b65e306f20b3a2f3a6c1dda01d314cea38f
http://github.com/moodle/moodle/commit/29924b65e306f20b3a2f3a6c1dda01d314cea38f
+ 3.6 en [essaynotgradedyet,mod_lesson]
+ 3.6 en [viewessayanswers,mod_lesson]