MDL-48248 enrol_manual: Ensure that the default value is always selected

enrol/manual/manage.php

@@ -89,6 +89,9 @@ if ($extendperiod) {
 } else {
     $defaultperiod = $instance->enrolperiod;
 }
+if (!isset($periodmenu[$defaultperiod])) {
+    $periodmenu[$defaultperiod] = get_string('numdays', '', floor($defaultperiod / DAYSECS));
+}
 if (empty($extendbase)) {
     if (!$extendbase = get_config('enrol_manual', 'enrolstart')) {
         // Default to now if there is no system setting.

enrol/manual/yui/quickenrolment/quickenrolment.js

@@ -237,6 +237,10 @@ YUI.add('moodle-enrol_manual-quickenrolment', function(Y) {
                 }
                 select.append(option);
             }
+            if (!index) {
+                select.append(create('<option value="'+defaultvalue+'">'+durationdays.replace('{a}', defaultvalue)+'</option>'));
+                index = ++count;
+            }
             select.set('selectedIndex', index);
         },
         getAssignableRoles : function(){