Bug 1060190 - Move the data connection settings from the per-sim panel to the upper panel

https://bugzilla.mozilla.org/show_bug.cgi?id=1060190
Checked from the UX spec, I think we don't need 
```html
       <ul>
         <li>
           <span data-l10n-id="dataNetwork">Carrier</span>
           <small id="dataNetwork-desc"></small>
         </li>
       </ul>
```
anymore.