changed wording of "delete data" when pass phrase is forgotten

![screen shot 2014-12-05 at 09 05 13](https://cloud.githubusercontent.com/assets/899043/5312719/f2200e14-7c5e-11e4-96b5-a845e4bb967a.png)

For a naive user the phrasing "delete data" sounds dangerous. It only pertains to the locally stored grid account configuration, not the data in the archive itself, nor the data on the local hard drive.