Author: Jake Dallimore
MDL-56041 core: add missing cap string for site:senderrormessage
http://git.moodle.org/gw?p=moodle.git;a=commit;h=8cb0b7262b56b605348fe8cc49628bf691e43122
http://github.com/moodle/moodle/commit/8cb0b7262b56b605348fe8cc49628bf691e43122
+ 4.0 en [site:senderrormessage,core_role]