change site-side-menu.js script element to main.js in default.html.

templates/layouts/default.html

@@ -22,7 +22,7 @@ fabricators, steel, welding, powder paint, archive">
 	  href="/images/favicon.png"
 	  type="image/x-icon">
     <script type="text/javascript"
-	    src="/js/site-side-menu.js">
+	    src="/js/main.js">
     </script>
     {% lisp (insert-snippet "site-wide-snippet.html") %}
   </head>