Author: Mihail Geshoski
MDL-35396 lesson: Fix detailed statistics display for essay questions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5ddac4b5b9d102f5682d554dcf30cf9275f095b5
http://github.com/moodle/moodle/commit/5ddac4b5b9d102f5682d554dcf30cf9275f095b5
+ 3.5 en [essaynotgradedyet,mod_lesson]
+ 3.5 en [viewessayanswers,mod_lesson]