Git commits in Moodle 2.5.x by M Kassaei

commit bdbbe777d9f6e0e7f7602aa36fe23c9f17158ff0
Author: M Kassaei <m.kassaei@open.ac.uk>
Date:   Thu, 17 Oct 2013 21:46:58 +0800
Tag:    v2.5.4

MDL-42181 quiz nav: highight all buttons when all Qs on one page