Quiz with password has no headings on password page

Issue
Headings - When starting an attempt as a student on a quiz that requires a password the password entry page has no headings.

Standard Level
WCAG 2 2.4.1 (A) http://www.w3.org/TR/UNDERSTANDING-WCAG20/navigation-mechanisms-skip.html

Impact
Serious

Example Link
http://demo.moodle.net/mod/quiz/startattempt.php

Test Steps

1. Create a quiz that requires a password (no need to set up browser security or open in new window)
2. Login as a student
3. Navigate to the course
4. Click ont he quiz
5. Click the attempt button
6. View the start attempt page requesting the quiz password.