Fix ajax_grader behat failure.

Fix the access of items under the question tab in
classic theme.

Remove the headings if the secondary nav
is present in this activity.

Update the behat tests to accomodate changes made
for the tertiary navigation.

Update behat tests to accommodate changes made for
tertiary navigation.

Update behat tests to accommodate changes made
for tertiary navigation.

Update behat tests for the changes made for tertiarynav.

Update the behat tests to accommodate the changes
made for the tertiary navigation.

Update behat tests for the changes made to the
tertiary navigation.

Update the behat tests to accommodate the
changes made for the tertiary navigation.

Update the tertiary navigation activity for
question.

When session lock debugging and read only sessions deubgging are both
enabled, session lock debugging becomes moot. This patch causes
the session lock deubgging code to exit early if read only sessions
debugging is enabled.

Update the behat tests due to the changes made in UI
for tertiary navigation.

Update the tertiary navigation for this
activity.

Update behat tests to accommodate the changes made
for tertiary navigation.

Update the tertiary navigation for this
activity.

Update the behat tests as UI is updated for
tertiary navigation.

Update the tertiary navigation for this activity.

Update tertiary navigation for this activity.
Updated the behat tests for the change made.

Update the tertiary navigation for the mod_workshop.
This also include a fix for behat tests due to the
tertiary navigation change made.