changed the creator for tasks from project_user to user, fixed api, documentation, filters, some other fixes

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

@@ -2,7 +2,6 @@
 
 use backend\modules\project\models\ProjectUser;
 use backend\modules\task\models\Task;
-use yii\helpers\ArrayHelper;
 use yii\helpers\Html;
 use yii\grid\GridView;
 
@@ -19,6 +18,10 @@ $this->params['breadcrumbs'][] = $this->title;
         <?= Html::a('Назначить сотрудника', ['create'], ['class' => 'btn btn-success']) ?>
     </p>
 
+    <?= $this->render('_search_by_project', [
+        'model' => $searchModel,
+    ]) ?>
+
     <?= GridView::widget([
         'dataProvider' => $dataProvider,
         'filterModel' => $searchModel,