Author: Ryan Wyllie
MDL-58099 block_myoverview: display message when no events
Part of MDL-55611 epic.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d4718e5ab96a330a7215d5e73964240f57babf5f
http://github.com/moodle/moodle/commit/d4718e5ab96a330a7215d5e73964240f57babf5f
+ 3.3 en [noevents,block_myoverview]