remove /data/ prefix from trigger label in readable form data

Before:

![screen shot 2014-04-30 at 10 13 11 am](https://cloud.githubusercontent.com/assets/137212/2839007/63982ca6-d03f-11e3-8158-56e31f124867.png)

After:

![screen shot 2014-04-30 at 10 13 48 am](https://cloud.githubusercontent.com/assets/137212/2839009/672fe188-d03f-11e3-8600-2dd27a43bcb8.png)