updated plgntls :

- renamed PLGNTLS_class -> Plgntls
- changed method 'add_to_front()' to static method
- moved fetch script as inline script, so the plgntls file is single
- improved the way inline script and styles are added

plugins/cipf_plugin/js/paypal/on_approve.js

@@ -1,6 +1,4 @@
-
 import { resultMessage } from './result_message.js';
-import { PLGNTLS_fetch } from '../../utils/plgntls_fetch.js';
 
 /*
 * @see https://developer.paypal.com/docs/checkout/standard/integrate/#link-integratebackend