Display sent_at timestamps instead of received_at

js/views/message_view.js

@@ -60,7 +60,7 @@
             this.$el.html(
                 Mustache.render(this.template, {
                     message: this.model.get('body'),
-                    timestamp: moment(this.model.get('received_at')).fromNow(),
+                    timestamp: moment(this.model.get('sent_at')).fromNow(),
                     sender: (contact && contact.getTitle()) || '',
                     avatar_url: (contact && contact.getAvatarUrl())
                 }, this.render_partials())