Author: Frederic Massart
MDL-18301 Gradebook: Added feature for components to control grade visibility
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2dd2bd7ead4d1cb47cd59b6ee3299df71146e3a4
http://github.com/moodle/moodle/commit/2dd2bd7ead4d1cb47cd59b6ee3299df71146e3a4
+ 2.3 en [componentcontrolsvisibility,core_grades]