Author: Mihail Geshoski
MDL-72873 core_grades: Add general tertiary navigation
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d1a0e4a95cddf1ed039e8df3e7b9a92cfcd2a65c
http://github.com/moodle/moodle/commit/d1a0e4a95cddf1ed039e8df3e7b9a92cfcd2a65c
+ 4.0 en [setup,core_grades]