Author: Andrea Bicciolo
MDL-38480_m Fix for messy usage of language strings in block course overview
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0e633595d87651773c0a27676c065ac8463b4281
http://github.com/moodle/moodle/commit/0e633595d87651773c0a27676c065ac8463b4281
+ 2.5 en [activityoverview,mod_lesson]
+ 2.5 en [activityoverview,mod_scorm]