Fixes question list when using Respondus LockDown Browser on a Quiz set to deliver one question at a time

Description of the Problem:
The question list on the right side bar is rendered as static text instead of clickable links when a Quiz is configured to require LockDown Browser and deliver one question at a time. This happens even if the "Lock questions after answering" option is not selected.

Expected Result:
Regardless of the requirement for LockDown Browser,  the question list on the right side bar should be rendered as clickable links if the Quiz is configured to show one question at a time and the "Lock questions after answering" option is not selected.

Steps to Reproduce:
1) Configure a Quiz with the following options: a) Restrict Quiz, b) Require Respondus LockDown Browser, c) Show One Question at a Time
2) Take the Quiz using Respondus LockDown Browser
3) Observe that the question list is rendered as static text

Test Plan:
Repeat the steps to reproduce after applying the patch. Observe that the question list is now rendered as clickable links.