fix other regressions from 83773002, re #4030

Merge request studip/studip!2916

app/controllers/course/grouping.php

@@ -37,7 +37,7 @@ class Course_GroupingController extends AuthenticatedController
             throw new AccessDeniedException(_('Sie haben leider nicht die notwendige Berechtigung für diese Aktion.'));
         }
 
-        if ($GLOBALS['perm']->have_studip_perm('admin', $this->course_id)) {
+        if ($GLOBALS['perm']->have_studip_perm('admin', $this->course->id)) {
             $widget = new CourseManagementSelectWidget();
             Sidebar::get()->addWidget($widget);
         }

app/controllers/questionnaire.php

@@ -54,7 +54,7 @@ class QuestionnaireController extends AuthenticatedController
         }
 
         Navigation::activateItem("/course/admin/questionnaires");
-        if ($GLOBALS['perm']->have_studip_perm('admin', $this->course_id)) {
+        if ($GLOBALS['perm']->have_studip_perm('admin', $this->range_id)) {
             // Ensure the select widget is added last
             NotificationCenter::on('SidebarWillRender', function () {
                 $widget = new CourseManagementSelectWidget();