Author: Helen Foster
MDL-72879 lang: Import fixed English strings (en_fix)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a7b0d7cb7bb39b23967e8a8b9ab9ed8ae1fad366
http://github.com/moodle/moodle/commit/a7b0d7cb7bb39b23967e8a8b9ab9ed8ae1fad366
+ 3.10 en [removeallcoursegrades_help,core_grades]