Author: David Mudrak
MDL-25072 convert $CFG->disablecourseajax to $CFG->enablecourseajax
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8b2918a425a157d1b08873db1af8a78840abc96f
http://github.com/moodle/moodle/commit/8b2918a425a157d1b08873db1af8a78840abc96f
+ 2.0 en [enablecourseajax,core_admin]
+ 2.0 en [enablecourseajax_desc,core_admin]
- 2.0 en [configdisablecourseajax,core_admin]
- 2.0 en [disablecourseajax,core_admin]