Compatibility with Vaadin 7

```
... against the changes due at 2012-08-29. See
https://github.com/vaadin/vaadin/commit/e18177bac62e8367829dfc5ec3083a09973e621e

Thank You!
```

Original issue reported on code.google.com by `l...@itscope.de` on 7 Feb 2013 at 2:02
