Author: Mihail Geshoski
MDL-73863 course: Add tertiary navigation in completion pages
http://git.moodle.org/gw?p=moodle.git;a=commit;h=36fe5695fe97314ff713a25893a05ac59d2d3ead
http://github.com/moodle/moodle/commit/36fe5695fe97314ff713a25893a05ac59d2d3ead
+ 4.0 en [coursecompletionnavigation,core_completion]