Updated #750 - Adding collapable IOS notifications

config/script/notify_engine.yaml

@@ -44,6 +44,8 @@ notify_engine:
             url: "{{ url }}"
             content-type: "{{ content_type }}"
             hide-thumbnail: false
+            apns_headers:
+              'apns-collapse-id': "{{ apns_id }}"
           push:
             sound: "{{ ios_sound }}"
             badge: "{{ ios_badge }}"