anchor.diff:  if (appDesc != null) {
     appTitle = appName + " :: " + appDesc;
   }
  +
  +String extraHead = "/index-head.jsp";
  +String extraFoot = "/index-foot.jsp";
  +String extraButtons = "/index-nav-buttons.jsp";
  +
  +if (pageContext.getServletContext().getResource(extraHead) == null) {
  +	extraHead = null;
  +}
  +if (pageContext.getServletContext().getResource(extraFoot) == null) {
  +	extraFoot = null;
  +}
  +if (pageContext.getServletContext().getResource(extraButtons) == null) {
  +	extraButtons = null;
  +}
  +
   %>
   <!DOCTYPE html>
   <html lang="en" ng-app="axelor.app" ng-controller="AppCtrl" ng-cloak>
  
positive.code:     <!-- JavaScript at the bottom for fast page loading -->
      <script src="js/messages.js"></script>
      <x:script src="js/application.js"/>
  
    </body>
  </html>
  
negative.code: 
      <!-- Le fav and touch icons -->
      <link rel="shortcut icon" href="ico/favicon.ico">
      <% if (extraHead != null) { %> <jsp:include page="<%= extraHead %>" /> <% } %>
    </head>
    <body>
  
  