Refactor registration management styles and enhance AJAX handling, update version code to 4.72.773

This commit refines the CSS styles for the registration management form, adjusting margins and padding for better layout. It also updates the JavaScript to include the epr_id in the delete action, improving the handling of AJAX requests. Additionally, the version code is incremented to 4.72.773 to reflect these changes.

php/inc_settings.php

@@ -7,7 +7,7 @@
  * Constantes *
  *
  **************/
-define('_VERSION_CODE', '4.72.772');
+define('_VERSION_CODE', '4.72.774');
 define('_DATE_CODE', '2026-07-09');
 //MSIN-4290
 define('QR_SECRET_KEY', 'ms1_qr_2026_cle_secrete_longue_et_fixe');