multiplemarks-checkbox bug fixed

Author: TamaroWalter

mod_form.php

@@ -225,7 +225,7 @@ public function definition() {
         $mform->setDefault('allownegativereputation', MOODLEOVERFLOW_REPUTATION_NEGATIVE);
 
         // Allow multiple marks of helpful/solved.
-        $mform->addElement('checkbox', 'allowmultiplemarks', get_string('allowmultiplemarks', 'moodleoverflow'));
+        $mform->addElement('advcheckbox', 'allowmultiplemarks', get_string('allowmultiplemarks', 'moodleoverflow'));
         $mform->addHelpButton('allowmultiplemarks', 'allowmultiplemarks', 'moodleoverflow');
         $mform->setDefault('allowmultiplemarks', 0);