add title and testing_date to user_questionnaire

backend/modules/questionnaire/views/user-questionnaire/index.php

@@ -53,6 +53,7 @@ $this->params['breadcrumbs'][] = $this->title;
             ],
             'created_at',
             'updated_at',
+            'testing_date',
 
             ['class' => 'yii\grid\ActionColumn'],
         ],