Author: Jun Pataleta
MDL-76803 lang: Make email display options more concise
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8376eec99dc2ccd35f9280dceac909c2389342e6
http://github.com/moodle/moodle/commit/8376eec99dc2ccd35f9280dceac909c2389342e6
+ 4.0 en [emaildisplay,core]
+ 4.0 en [emaildisplay_help,core]
+ 4.0 en [emaildisplaycourse,core]
+ 4.0 en [emaildisplayhide,core]
+ 4.0 en [emaildisplayno,core]
+ 4.0 en [emaildisplayyes,core]