Author: Mihail Geshoski
MDL-75153 grade: Update the general tertiary nav selector in gradebook
Updates the general tertiary nav selector in gradebook to use the new
structure that utilizes the existing select_menu output component.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0e1cdfde1d1da3c4511cc28acfc0ef6a253e9059
http://github.com/moodle/moodle/commit/0e1cdfde1d1da3c4511cc28acfc0ef6a253e9059
+ 4.1 en [gradebooknavigationmenu,core_grades]