Author: sam marshall
MDL-29719 Option to display course shortname alongside fullname on course lists
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7fb46992661e2eb1fb7bfd1a6d3f7f1ccf8fd306
http://github.com/moodle/moodle/commit/7fb46992661e2eb1fb7bfd1a6d3f7f1ccf8fd306
+ 2.2 en [courselistshortnames,core_admin]
+ 2.2 en [courselistshortnames_desc,core_admin]