Small fix for Keon device

On my keon device the lock did not work because the `.get()` did not specify any key and according to the MDN documentation there needs to be a setting name `SettingsLock.get(settingName);` 
Also added a media query to fix the clock font size.

### Before
![before](https://f.cloud.github.com/assets/810040/2327061/13616f02-a3eb-11e3-8614-62b0df90e2fa.png)

### After

![after](https://f.cloud.github.com/assets/810040/2327054/051952d4-a3eb-11e3-9996-cc1eca6a7665.png)