Preview should work on installation without vhost (with path in URL)
When clicking on the preview button a new window is opened with a wrong URI.
This happens because the TYPO3.FormBuilder.Configuration.endpoints address is
used with a '/' in front as the param to window.open. When on a development installation
without a vhost, and therefore a base href with a path, the path is ignored.
- make the address relative by removing the '/' in app.js:492
- let TYPO3.FormBuilder.Utility.getUri() respect the base href in the html