Author: Tim Hunt
MDL-29428 quiz navigation panel should use 'This page' (accessibility improvement)
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a9384ab0d0452717f280f04818e01fe98c7ef949
http://github.com/moodle/moodle/commit/a9384ab0d0452717f280f04818e01fe98c7ef949
+ 2.1 en [onthispage,mod_quiz]