Disabled autoRefresh for inserted Actions events

- we don't end up using the inserted model from Bookshelf, so we
  shouldn't be performing a SELECT on the entry
- this disables refreshing the model using Bookshelf's `autoRefresh:
  false` and allows the key through the sanitization for `add

ghost/core/core/server/models/base/plugins/actions.js

@@ -93,7 +93,7 @@ module.exports = function (Bookshelf) {
 
             const insert = (action) => {
                 Bookshelf.model('Action')
-                    .add(action)
+                    .add(action, {autoRefresh: false})
                     .catch((err) => {
                         if (_.isArray(err)) {
                             err = err[0];

ghost/core/core/server/models/base/plugins/sanitize.js

@@ -38,6 +38,8 @@ module.exports = function (Bookshelf) {
                 return baseOptions.concat('shallow', 'columns', 'previous');
             case 'destroy':
                 return baseOptions.concat(extraOptions, ['id', 'destroyBy', 'require']);
+            case 'add':
+                return baseOptions.concat(extraOptions, ['autoRefresh']);
             case 'edit':
                 return baseOptions.concat(extraOptions, ['id', 'require']);
             case 'findOne':