Remove an extension.trigger

No need to trigger an extension-wide event now that all our models live
in the background page. We can just update them more or less directly.

js/background.js

@@ -218,9 +218,10 @@
                     var deliveries     = message.get('delivered') || 0;
                     var conversationId = message.get('conversationId');
                     if (conversationId === pushMessage.source || groups.get(conversationId)) {
-                        message.save({delivered: deliveries + 1}).then(function() {
-                            extension.trigger('message', message); // notify frontend listeners
-                        });
+                        message.save({delivered: deliveries + 1}).then(
+                            // notify frontend listeners
+                            updateConversation.bind(window,conversationId)
+                        );
                         return;
                         // TODO: consider keeping a list of numbers we've
                         // successfully delivered to?

js/panel_controller.js

@@ -29,6 +29,14 @@
         return conversations.get(windowMap.modelIdFrom(windowId));
     };
 
+    window.updateConversation = function(conversationId) {
+        var conversation = conversations.get(conversationId)
+        if (conversation) {
+            conversation.fetch();
+            conversation.fetchMessages();
+        }
+    };
+
     function closeConversation (windowId) {
         windowMap.remove('windowId', windowId);
     };