Fixing issue with hovering over the SEO score column in the backend.

See image:
![screenshot 2014-10-09 20 43 04](https://cloud.githubusercontent.com/assets/2278221/4586473/44726f9a-5018-11e4-9d9e-c58ee1a4f3a0.png)


Issue was there on Safari, Chrome, and Firefox for Mac, this should add enough padding to the right so that the issue isn't there anymore.