Do not show closed tasks in task move position form

app/Controller/TaskMovePositionController.php

@@ -4,6 +4,7 @@ namespace Kanboard\Controller;
 
 use Kanboard\Core\Controller\AccessForbiddenException;
 use Kanboard\Formatter\BoardFormatter;
+use Kanboard\Model\TaskModel;
 
 /**
  * Class TaskMovePositionController
@@ -21,7 +22,10 @@ class TaskMovePositionController extends BaseController
             'task' => $task,
             'board' => BoardFormatter::getInstance($this->container)
                 ->withProjectId($task['project_id'])
-                ->withQuery($this->taskFinderModel->getExtendedQuery())
+                ->withQuery($this->taskFinderModel->getExtendedQuery()
+                    ->eq(TaskModel::TABLE.'.is_active', TaskModel::STATUS_OPEN)
+                    ->neq(TaskModel::TABLE.'.id', $task['id'])
+                )
                 ->format()
         )));
     }