Author: Ankit Agarwal
MDL-28965 administration: Updating description string for the setting navshowallcourses
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0cb1a22cba30d68734887f787479767cf21f07c8
http://github.com/moodle/moodle/commit/0cb1a22cba30d68734887f787479767cf21f07c8
+ 2.3 en [confignavshowallcourses,core_admin]