Update the style on the batch edit page. Fixes #737

Used to look like this:
![screen shot 2014-12-03 at 8 51 00 pm](https://cloud.githubusercontent.com/assets/92044/5292893/23528fac-7b2e-11e4-9a70-c38562329144.png)

Now it looks like this:
![screen shot 2014-12-03 at 8 47 59 pm](https://cloud.githubusercontent.com/assets/92044/5292884/0326c644-7b2e-11e4-8f58-a7cf60063d6d.png)