Restore jQuery version of file-uploads.js (#4300)

hypha/static_src/javascript/file-uploads.js

-document.addEventListener("DOMContentLoaded", function () {
+jQuery(function ($) {
   // Initialize django-file-form
-  document.querySelectorAll("form").forEach(function (form) {
-    // Prevent initializing it multiple times and run it for forms
-    // that have a `form_id` field added by django-file-form.
-    if (!form.initUploadFieldsDone && form.querySelector("[name=form_id]")) {
-      init(form);
-      form.initUploadFieldsDone = true;
-    }
-  });
+  $("form")
+    .get()
+    .forEach(function (form) {
+      // Prevent initilising it multiple times and run it for forms
+      // that have a `form_id` field added by django-file-form.
+      if (!form.initUploadFieldsDone && form.querySelector("[name=form_id]")) {
+        init(form);
+        form.initUploadFieldsDone = true;
+      }
+    });
 
   /**
    * Initialize django-file-form for a form.
    * @param {object} form The form to initialize.
    */
   function init(form) {
-    if (document.querySelectorAll(".form__group--file").length) {
+    if ($(".form__group--file").length) {
       window.initUploadFields(form);
 
       // Hide wrapper elements for hidden inputs added by django-file-form
-      document.querySelectorAll("input[type=hidden]").forEach(function (input) {
-        var closestFormGroup = input.closest(".form__group");
-        if (closestFormGroup) {
-          closestFormGroup.hidden = true;
-        }
-      });
+      $("input[type=hidden]").closest(".form__group").hide();
     }
   }
 });