Author: Paul Holden
MDL-72608 output: define default popover region template lang string.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=bada9f3efa42b37cb8167d5a5243edeb0fcee038
http://github.com/moodle/moodle/commit/bada9f3efa42b37cb8167d5a5243edeb0fcee038
+ 5.0 en [showpopovermenu,core]