MDL-72010 quiz: prevent session timeouts during attempts

mod/quiz/attempt.php

@@ -116,6 +116,7 @@ if (!$attemptobj->set_currentpage($page)) {
 // Initialise the JavaScript.
 $headtags = $attemptobj->get_html_head_contributions($page);
 $PAGE->requires->js_init_call('M.mod_quiz.init_attempt_form', null, false, quiz_get_js_module());
+\core\session\manager::keepalive(); // Try to prevent sessions expiring during quiz attempts.
 
 // Arrange for the navigation to be displayed in the first region on the page.
 $navbc = $attemptobj->get_navigation_panel($output, 'quiz_attempt_nav_panel', $page);

mod/quiz/summary.php

@@ -79,6 +79,8 @@ if ($attemptobj->is_finished()) {
     redirect($attemptobj->review_url());
 }
 
+\core\session\manager::keepalive(); // Try to prevent sessions expiring during quiz attempts.
+
 // Arrange for the navigation to be displayed.
 if (empty($attemptobj->get_quiz()->showblocks)) {
     $PAGE->blocks->show_only_fake_blocks();