Integrate map lock into a header

Removes the lock selector in the key and uses CFPB minicons a lock checkbox. Looks like this:

![screen shot 2014-08-06 at 8 43 06 pm](https://cloud.githubusercontent.com/assets/326918/3836080/599798c4-1dcc-11e4-97bc-981f01f21cdc.png)
![screen shot 2014-08-06 at 8 43 21 pm](https://cloud.githubusercontent.com/assets/326918/3836083/5d7cbbc2-1dcc-11e4-892e-3e2a15d91640.png)