Small UI improvements to "set up data storage" page

@jebeck or @ianjorgensen if you have time to quickly spot-check this? It is mainly a small set of UI changes @skrugman and I selected to improve the "Set up data storage" page's usability.

It also allowed me to clean up a bunch of dead code: `patientedit.js` page is now `patientnew.js` (it was only used to create new data storage, since we moved the "edit" functionality to the `patient.js` page).

![screen shot 2014-11-13 at 4 25 14 pm](https://cloud.githubusercontent.com/assets/1306536/5036932/b712cde8-6b51-11e4-8dcf-f82fc6130f2f.png)