Resolve #3690 "FormBuilder macht kein autoStore() mehr"

Closes #3690

Merge request studip/studip!2565

lib/classes/forms/Form.php

@@ -282,7 +282,7 @@ class Form extends Part
              \Request::isPost()
              && \Request::isAjax()
              && !\Request::isDialog()
-             && \Request::submitted($this->getSaveButtonName())
+             && \Request::submitted('STUDIPFORM_AUTOSTORE')
         ) {
             if (\Request::submitted('STUDIPFORM_SERVERVALIDATION')) {
                 $this->validate();

resources/assets/javascripts/bootstrap/forms.js

@@ -284,6 +284,7 @@ STUDIP.ready(function () {
 
                                 if (v.STUDIPFORM_AUTOSAVEURL) {
                                     let params = v.getFormValues();
+                                    params.STUDIPFORM_AUTOSTORE = 1;
 
                                     $.ajax({
                                         url: v.STUDIPFORM_AUTOSAVEURL,