Delay conversation creation til post-decrypt

js/background.js

@@ -53,13 +53,7 @@
             var now = new Date().getTime();
             var timestamp = pushMessage.timestamp.toNumber();
 
-            var conversation = getConversation({
-                id   : pushMessage.source,
-                type : 'private'
-            });
-
-            conversation.fetch().always(function() {
-                var message = conversation.messageCollection.add({
+            var message = new Whisper.Message({
                 source         : pushMessage.source,
                 sourceDevice   : pushMessage.sourceDevice,
                 relay          : pushMessage.relay,
@@ -73,7 +67,6 @@
             storage.put("unreadCount", newUnreadCount);
             extension.navigator.setBadgeText(newUnreadCount);
 
-                conversation.save().then(function() {
             message.save().then(function() {
                 return new Promise(function(resolve) {
                     resolve(textsecure.protocol_wrapper.handleIncomingPushMessageProto(pushMessage).then(
@@ -98,8 +91,6 @@
                     }
                 });
             });
-                });
-            });
         }
 
         // lazy hack

js/models/messages.js

@@ -17,7 +17,7 @@
     'use strict';
     window.Whisper = window.Whisper || {};
 
-    var Message  = Backbone.Model.extend({
+    var Message  = window.Whisper.Message = Backbone.Model.extend({
         database  : Whisper.Database,
         storeName : 'messages',
         defaults  : function() {