erp5_web_manifest: handlebars is not used anymore

bt5/erp5_web_manifest/PathTemplateItem/web_page_module/gadget_manifest_header_html.html

@@ -8,7 +8,7 @@
     <!-- renderjs -->
     <script src="rsvp.js" type="text/javascript"></script>
     <script src="renderjs.js" type="text/javascript"></script>
-    <script src="handlebars.js" type="text/javascript"></script>
+    <script src="domsugar.js" type="text/javascript"></script>
     <script src="gadget_global.js" type="text/javascript"></script>
 
     <!-- custom script -->