Now, if a site-theme is set for tablet/phone AND the user is using
a tablet/phone that site-theme will be used, always. In any other
case the normal theme resolution will be used: course, category, ...

Damyon Wiese authored Jul 13, 2015 and Eloy Lafuente committed Jul 13, 2015

This needs to be done before we can expose any webservices that
change state, or return private info to ajax (to prevent CSRF).

Currently there are no webservices exposed to ajax that meet these
criteria - so this issue is to prevent future security issues.

    question/type/calculatedmulti/questiontype.php:
        - Add public make_answer method so that apply_attempt_state
          method in qtype_multichoice_base does not cause a fatal
          error when attempting to call make_answer.

- complete and cleanup upgrade.txt
- replace remaining uses in comments.
- fix some incorrect bulk-replacement in previous commit.

Rendering a large number of questions may be quite slow, so we want to
raise the limit.

We don’t call raise() in the loop because the quiz buffer captures this
function for a AJAX script, and we should only call raise if we expect
a corresponding output to the users browser. This helps to prevent
unexpected load balancer disconnects. See core_php_time_limit::raise()
for more details.

(That is outputing content, rest of function is not!)