Bug972573, The selection screen for adding a contact with multiple phone...

... numbers to a SMS message lacks a cancel, back, or 'x' button

It correspondence of reviews.
https://github.com/mozilla-b2g/gaia/pull/20051

https://bugzilla.mozilla.org/show_bug.cgi?id=972573
ni: identifiers for l10n strings should be in lower case, also the name should be a bit more representative, something like `pick_destination` will be ok