Multiple flag fix (#1742)

* fix

* multiple file logic cleanup

* fix

---------

Co-authored-by: a <a>

src/main/resources/templates/convert/img-to-pdf.html

@@ -18,7 +18,7 @@
                 <span class="tool-header-text" th:text="#{imageToPDF.header}"></span>
               </div>
               <form method="post" enctype="multipart/form-data" th:action="@{'/api/v1/convert/img/pdf'}">
-                <div th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false, accept='image/*', inputText=#{imgPrompt})}"></div>
+                <div th:replace="~{fragments/common :: fileSelector(name='fileInput', multipleInputsForSingleRequest=false, accept='image/*', inputText=#{imgPrompt})}"></div>
                 <div class="mb-3">
                   <label for="fitOption" th:text="#{imageToPDF.selectLabel}">Fit Options</label>
                   <select class="form-control" id="fitOption" name="fitOption">