Author: John Beedell
MDL-55911 Quiz: Accessibility, Label blanks in DD questions
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4296f2b9da88753685a17e3f4d71eef83bd378d2
http://github.com/moodle/moodle/commit/4296f2b9da88753685a17e3f4d71eef83bd378d2
+ 3.0 en [blank,qtype_ddimageortext]
+ 3.0 en [blank,qtype_ddwtos]