Bug 913421 - Handle FDN status in Messages app

Adding FDN handling when sending SMS, notifying the user when one or
more (in case of multiple recipients) FDN blocked numbers.
Bug 912525 - [Email] Attachment icon missing in inbox from incoming email. r=jrburke
Merge pull request #12109 from asutherland/fix-attachment-icon

Bug 912525 - [Email] Attachment icon missing in inbox from incoming email. r=jrburke
Merge pull request #12061 from lissyx/bug913421

Bug 913421 - Handle FDN status in Messages app, r=steveck
Bug 915058 - [SMS] use more explicit l10n arguments in dialog.js