Implicit type cast through ArrayUtility::stripTagsFromValuesRecursive
`\TYPO3\CMS\Core\Utility\ArrayUtility::stripTagsFromValuesRecursive` does not care if the value is a number, so any integers are returned as strings.
That's a problem e.g. in the form extension, which uses this method in `\TYPO3\CMS\Form\Controller\FormEditorController::transformFormDefinitionForFormEditor`.
The method should only change strings.