Bug 1112539 - [Messages] Number-only contact details are broken in remove recipient confirmation dialog. r=julien

Really, not sure how to deal with this nasty BB selector in a better way :(
```
form[role="dialog"][data-type="confirm"]  p span {
  ....
  display: block;
  ....
}
```

I start thinking that having small webcomponent for phone-details is a good idea :)