[TASK] Forward rendering context in VariablesViewHelper

To be able to use ViewHelpers that requires the ServerRequest, for example the CObjectViewHelper.

Author: christophlehmann

Classes/ViewHelpers/Misc/VariablesViewHelper.php

@@ -59,6 +59,7 @@ public function render(): string
         $function = $this->arguments['function'];
         $mailRepository = GeneralUtility::makeInstance(MailRepository::class);
         $parseObject = GeneralUtility::makeInstance(StandaloneView::class);
+        $parseObject->setRenderingContext($this->renderingContext);
         $parseObject->setTemplateSource($this->removePowermailAllParagraphTagWrap($this->renderChildren()));
         $parseObject->assignMultiple(
             ArrayUtility::htmlspecialcharsOnArray($mailRepository->getVariablesWithMarkersFromMail($mail))