🐛 Fixed potential "Request entity too large" error when saving members

no issue

- `email_recipient` records are embedded alongside member data when fetching individual members so the member activity feed can be generated
- full email details are included for each email so that previews can be generated which can result in a large payload
- by default Ember Data will push all embedded records back to the server when saving which resulted in `Request entity too large` errors in some environments when a member has received many emails

ghost/admin/app/serializers/member.js

@@ -15,9 +15,12 @@ export default ApplicationSerializer.extend(EmbeddedRecordsMixin, {
         // Properties that exist on the model but we don't want sent in the payload
         delete json.stripe;
         delete json.geolocation;
+        delete json.email_recipients;
+
         // Normalize properties
         json.name = json.name || '';
         json.note = json.note || '';
+
         return json;
     }
 });