add option to make BRC AF selector static; fix BRC AF style in chrome

- add option for static AF selector to Preferences
  (movable window remains default)
![screen shot 2014-03-02 at 01 26 24](https://f.cloud.github.com/assets/6425106/2303128/d6537b3c-a1a1-11e3-9511-d9d672a00848.png)

- show static AF selector below city name on Smuggling page
![screen shot 2014-03-02 at 01 27 14](https://f.cloud.github.com/assets/6425106/2303129/e031089a-a1a1-11e3-8d0f-9ff456d6235f.png)

- fix background gradient on movable AF selector in Chrome