Adjust controls when keyboard is shown for Jetpack

![ios simulator screen shot 18 mar 2014 11 11 44](https://f.cloud.github.com/assets/8739/2446469/0be622fe-ae86-11e3-87f1-fa8214ed9642.png)
![ios simulator screen shot 18 mar 2014 11 11 50](https://f.cloud.github.com/assets/8739/2446472/0bf76014-ae86-11e3-9706-aa5b21a1a432.png)
![ios simulator screen shot 18 mar 2014 11 12 28](https://f.cloud.github.com/assets/8739/2446471/0bf4117a-ae86-11e3-9560-7e4928e556be.png)
![ios simulator screen shot 18 mar 2014 11 12 35](https://f.cloud.github.com/assets/8739/2446473/0bfaeebe-ae86-11e3-89f0-514369f9ae59.png)

It still looks a bit tight on iPhone landscape, but maybe we should be restricting to portrait on iPhone for NUX?

Fixes #1262