Bug 925404 - [B2G] [SMS] Always include the phone number in the SMS Thread UI, even if the carrier is known. r=schung

* Using new phone format everywhere;
* Using different color for carrier name in the thread view header;
* Removed a bunch of unsed code.
Yeah, the only reason why it's used here is that nasty BB confirm dialog selector that makes span "block" elements (e.g. remove recipient prompt):

```
form[role="dialog"][data-type="confirm"] p span {
    ...
    display: block;
    ...
}
```

So, I can remove ```.phone-details``` from here, but then I'll need to somehow override this confirm styles. Just tell me what you prefer?