Load all inbox convos before rendering

This is a better alternative to the fix in 0434c4b, which causes
problems when creating a new conversation from entering a phone number.

// FREEBIE

js/conversation_controller.js

@@ -74,7 +74,7 @@
             });
         },
         updateInbox: function() {
-            conversations.fetchActive();
+            return conversations.fetchActive();
         }
     };
 })();