Course config: Fix issue preventing tags and video_url to appear when…

… allow_teachers_to_classes is enabled

main/course_info/infocours.php

@@ -129,7 +129,7 @@ function is_settings_editable()
 $extra_field = new ExtraField('course');
 
 $extraFieldAdminPermissions = false;
-$showOnlyTheseFields = [];
+$showOnlyTheseFields = ['tags', 'video_url'];
 if (api_get_configuration_value('allow_teachers_to_classes') === true) {
     $extraFieldAdminPermissions = true;
     $showOnlyTheseFields[] = 'course_hours_duration';