contao/core — pull request #7434 by ausi (2014-11-12 12:32:29+00:00)
Title: Display nested wrapper elements with a nested style

This improves the styling of nested wrapper elements:

![wrapper-elements](https://cloud.githubusercontent.com/assets/367169/5010059/7f8a636a-6a6e-11e4-8bcb-13c02daa6afa.png)

And fixes the drag and drop script.

Related: #5976