Author: Mark Nelson
MDL-40054 mod_lesson: replaced 'view highscores' add_to_log call with an event
http://git.moodle.org/gw?p=moodle.git;a=commit;h=81d2421c55a5fc241b13fa1e65cbe371dbad4bbb
http://github.com/moodle/moodle/commit/81d2421c55a5fc241b13fa1e65cbe371dbad4bbb
+ 2.7 en [eventhighscoresviewed,mod_lesson]