Author: Marina Glancy
MDL-49257 grades: strings adjustments
http://git.moodle.org/gw?p=moodle.git;a=commit;h=05fde3409f29b1aadbc5f01043b211a2c0189c05
http://github.com/moodle/moodle/commit/05fde3409f29b1aadbc5f01043b211a2c0189c05
+ 2.8 en [gradebookcalculationsfixbutton,core_grades]
+ 2.8 en [gradebookcalculationswarning,core_grades]