[list] Sort notifications by latest first

src/subscription.rs

@@ -174,7 +174,18 @@ impl Subscription {
     fn handle_event(&self, ev: ListenerEvent) {
         match ev {
             ListenerEvent::Message(msg) => {
-                self.imp().messages.append(&glib::BoxedAnyObject::new(msg));
+                let time = msg.time;
+                let messages = &self.imp().messages;
+                let pos = (0..messages.n_items())
+                    .find(|&i| {
+                        messages
+                            .item(i)
+                            .and_then(|item| item.downcast::<glib::BoxedAnyObject>().ok())
+                            .map(|b| b.borrow::<models::ReceivedMessage>().time > time)
+                            .unwrap_or(false)
+                    })
+                    .unwrap_or(messages.n_items() as u32);
+                messages.insert(pos, &glib::BoxedAnyObject::new(msg));
                 self.update_unread_count();
             }
             ListenerEvent::ConnectionStateChanged(connection_state) => {