Bug 1105857 - [Messages] User doesn't receive any notification about incoming message if native modal dialog is shown. r=schung

I think the original reason is to distinct the title of single/batch deletion(singular and plural for translation). But the turth is in selection mode it's still posible to pick one message for deletion, and confirm 'shows Delete selected "messages"?' no matter how many messages you selected. Thanks for the question and we should fire a bug for this.