Issue 3915 - Dispatch filters.added consistently

lib/filterStorage.js

Index: lib/filterStorage.js
diff --git a/lib/filterStorage.js b/lib/filterStorage.js
index 9ea35f53365c03fc052c1bf43070f5c7aa54f3f2..3429b5154082435fc64a7eca01a99c0264c9ab50 100644
--- a/lib/filterStorage.js
+++ b/lib/filterStorage.js
@@ -232,20 +232,22 @@ let FilterStorage = exports.FilterStorage =
         return;   // No need to add
       subscription = FilterStorage.getGroupForFilter(filter);
     }
+
     if (!subscription)
     {
       // No group for this filter exists, create one
       subscription = SpecialSubscription.createForFilter(filter);
       this.addSubscription(subscription);
-      return;
     }
+    else
+    {
+      if (typeof position == "undefined")
+        position = subscription.filters.length;
 
-    if (typeof position == "undefined")
-      position = subscription.filters.length;
-
-    if (filter.subscriptions.indexOf(subscription) < 0)
-      filter.subscriptions.push(subscription);
-    subscription.filters.splice(position, 0, filter);
+      if (filter.subscriptions.indexOf(subscription) < 0)
+        filter.subscriptions.push(subscription);
+      subscription.filters.splice(position, 0, filter);
+    }
     if (!silent)
       FilterNotifier.triggerListeners("filter.added", filter, subscription, position);
   },