Author: Paul Holden
MDL-77943 group: use shorter names for visibility report elements.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ba64c15814b0bf747c1919d9bb58f4386e0730ba
http://github.com/moodle/moodle/commit/ba64c15814b0bf747c1919d9bb58f4386e0730ba
+ 4.2 en [participationshort,core_group]
+ 4.2 en [visibilityshort,core_group]