Author: Helen Foster
MDL-80221 lang: Import fixed English strings (en_fix)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d6a1af70d809f0ff983f6596fbfe56cb0d0dc738
http://github.com/moodle/moodle/commit/d6a1af70d809f0ff983f6596fbfe56cb0d0dc738
+ 4.2 en [participation_help,core_group]
+ 4.2 en [visibility_help,core_group]
+ 4.2 en [visibilityall,core_group]