Author: Tim Hunt
MDL-63403 filter_glossary: Fix lang string concatenation
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2e14a686ea2a8efd1a8c2134c770c2ae76d9eff1
http://github.com/moodle/moodle/commit/2e14a686ea2a8efd1a8c2134c770c2ae76d9eff1
+ 3.4 en [glossarycategory,filter_glossary]
+ 3.4 en [glossaryconcept,filter_glossary]