Multiple flag fix (#1742)

* fix

* multiple file logic cleanup

* fix

---------

Co-authored-by: a <a>

src/main/resources/templates/split-pdfs.html

@@ -20,7 +20,7 @@
             </div>
             <form th:action="@{'/api/v1/general/split-pages'}" method="post" enctype="multipart/form-data">
               <div
-                th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='application/pdf')}">
+                th:replace="~{fragments/common :: fileSelector(name='fileInput', multipleInputsForSingleRequest=false, accept='application/pdf')}">
               </div>
 
               <div class="mb-3">