BUGFIX: Return correct response set in module controllers

Previously the status code set in module actions via `throwStatus` or `response->setStatusCode()` was ignored.
With this change the individual module response is merged into the generic module response
which then contains the desired status code and other properties.

Neos.Neos/Classes/Controller/Backend/ModuleController.php

@@ -96,6 +96,7 @@ public function indexAction(array $module)
         $moduleResponse = new ActionResponse();
 
         $this->dispatcher->dispatch($moduleRequest, $moduleResponse);
+        $moduleResponse->mergeIntoParentResponse($this->response);
 
         if ($moduleResponse->getRedirectUri() !== null) {
             $this->redirectToUri($moduleResponse->getRedirectUri(), 0, $moduleResponse->getStatusCode());