forms: run file widget js code from widget template (#52046)

wcs/qommon/static/js/qommon.fileupload.js

@@ -361,9 +361,4 @@ $.WcsFileUpload = {
         $(base_widget).parents('form').find('div.buttons button').prop('disabled', true);
         var jqXHR = data.submit();
     }
-
 }
-
-$(function() {
-    $('.file-upload-widget').each($.WcsFileUpload.prepare);
-});

wcs/qommon/templates/qommon/forms/widgets/file.html

@@ -37,4 +37,10 @@
      data-popup>{% trans "Use file from the portfolio" %}</span></p>
 {% endif %}
 {% endblock %}
+
+<script>
+$(function() {
+  $('[data-field-id="{{ widget.field.id }}"]').each($.WcsFileUpload.prepare);
+});
+</script>
 {% endblock %}