Followup: Question tests/deploy version useful links.

Makt the question bank link work for hidden questions.

questiontestrun.php

@@ -66,6 +66,9 @@ unset($qbankparams['seed']);
 $qbankparams['qperpage'] = 1000; // Should match MAXIMUM_QUESTIONS_PER_PAGE but that constant is not easily accessible.
 $qbankparams['category'] = $questiondata->category . ',' . $question->contextid;
 $qbankparams['lastchanged'] = $question->id;
+if ($questiondata->hidden) {
+    $qbankparams['showhidden'] = 1;
+}
 $questionbanklink = new moodle_url('/question/edit.php', $qbankparams);
 $exportquestionlink = new moodle_url('/question/type/stack/exportone.php', $urlparams);
 $exportquestionlink->param('sesskey', sesskey());