#689 - changed settings modal presentation style on iPad

#689 

Before:

![before](https://f.cloud.github.com/assets/3904502/1634249/eafbb4aa-5796-11e3-9112-f9f6b3772997.gif)

After:

![after](https://f.cloud.github.com/assets/3904502/1634250/edb1b74e-5796-11e3-97f5-9058c8897714.gif)