Add setting setting 'hide_free_question_score' see BT#12613

Hide score for free/annotation/oral questions

main/exercise/question.class.php

@@ -1949,6 +1949,11 @@ abstract class Question
                 if (!empty($model)) {
                     $score['result'] = " ? ";
                 }
+
+                $hide = api_get_configuration_value('hide_free_question_score');
+                if ($hide === true) {
+                    $score['result'] = '-';
+                }
             }
         }
 

main/install/configuration.dist.php

@@ -518,6 +518,8 @@ $_configuration['send_all_emails_to'] = [
 // Allow send email notification per exercise
 //ALTER TABLE c_quiz ADD COLUMN notifications VARCHAR(255) NULL DEFAULT NULL;
 //$_configuration['allow_notification_setting_per_exercise'] = false;
+// Hide free/oral/annotation question result see BT#12613
+//$_configuration['hide_free_question_score'] = false;
 
 // Score model
 // Allow to convert a score into a text/color label