Author: Paul Holden
MDL-84941 course: fix activity button label on end of section.
Where the button is rendered after all section content, we should
fix the ARIA label attribute to refer to the current section rather
than non-existing subsequent activity.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e4c81e3f5f9693f1fc85eb1722f61f8888c7505c
http://github.com/moodle/moodle/commit/e4c81e3f5f9693f1fc85eb1722f61f8888c7505c
+ 4.5 en [insertcontentsection,core]