hide unnecessary fields in rails_admin and limit select objects in flow

- Removed unnecessary fields in rails admin for the different models in Setup module, like created_at, updated_at, and more.
- Fixed AfterSave, had wrong merge and change for the version in cenit-dynamic.
- Set some dynamic models in the script sample:load with 'after_save_callback: true'.
- Limit in the form add for Flow the options for select an object (model schema), with the condition that should have after_save_callback: true.