Added recommendation opt-out (bug 1072637)

 ![7d-spxvylir1julp9prgafdcj-sg67frvg75esnapg8](https://cloud.githubusercontent.com/assets/1106/4985733/b7fc5d14-6930-11e4-809f-957cc4093cbf.png)
![screen shot 2014-11-10 at 15 23 23](https://cloud.githubusercontent.com/assets/1106/4985739/c70cb402-6930-11e4-89c7-34c9666b35fc.png)

okay, fair enough. the Email one is a gray area. I know the checkbox is already wrapped in a `<label>`, but it would be nice if the `Personalization` text was always a `<label>` - but other fields may be added later.

thanks for clarifying. you're fine.