Polish 'Deploy to mobile' & 'Publish to web store' dialogs

@devoncarew
cc @dinhviethoa

* Includes a general fix for radio-button alignment
* Applies that also to 'Publish to web store' dialog
* Fixes margins of the dialog sections and normalizes the styling to the rest of dialogs

![screen shot 2014-06-12 at 4 43 28 pm](https://cloud.githubusercontent.com/assets/5606182/3265242/73a9a09c-f28c-11e3-98ad-0e769058a149.png)
![screen shot 2014-06-12 at 4 43 40 pm](https://cloud.githubusercontent.com/assets/5606182/3265244/786f6d50-f28c-11e3-8095-328e7031ce6d.png)

Same question here re: removing the form element. Does this dialog come up with a default radio button selected, and are the buttons mutually exclusive?