use FormData instead of jquery serializer

add todo

static/js/widget-app.js

@@ -1,25 +1,27 @@
 function submitForm(e) {
   e.preventDefault();
   form = $(this)
+  //TODO: convert form selector to use event element
   var csrf_token = form.find('input[name=csrfmiddlewaretoken]').val()
+  var formData = new FormData(e.currentTarget)
+
   var api_call = $.ajax({
     url: form.attr('action'),
-    method: form.data("method"),
-    data: form.serialize(),
     processData: false,
+    contentType: false,
+    type: form.data("method"),
+    data: formData,
     headers: {
       'X-CSRFToken': csrf_token
     },
-    contentType: 'application/x-www-form-urlencoded; charset=UTF-8'
-
   });
 
   api_call.always(function(data, textStatus, jqXHR) {
     window.location.reload()
   })
-
 }
 
 $(document).ready(function() {
   $('form.ajaxSubmit').submit(submitForm)
 });
+