Author: Huong Nguyen
MDL-73784 usertours: Update tour steps to use Moodle langstring
http://git.moodle.org/gw?p=moodle.git;a=commit;h=02f622c247a052b4d4b7c3e16dc549c4f32a734c
http://github.com/moodle/moodle/commit/02f622c247a052b4d4b7c3e16dc549c4f32a734c
+ 4.0 en [tour_navigation_mycourses_endtourlabel,tool_usertours]