erp5_xhtml_style: show different message on NotFound error rendering

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/standard_error_message_render.zpt

@@ -3,15 +3,25 @@
   xmlns:metal="http://xml.zope.org/namespaces/metal"
   xmlns:i18n="http://xml.zope.org/namespaces/i18n"
   metal:define-macro="standard_error_message_render"
+  tal:define="is_not_found_error python: options.get('error_type') == 'NotFound';
+              use_error_message python: not is_not_found_error and options.get('error_message')"
 >
-<div tal:condition="options/error_message" tal:content="structure options/error_message" />
-<div tal:condition="not: options/error_message">
+<div tal:condition="use_error_message" tal:content="structure options/error_message" />
+<div tal:condition="not: use_error_message">
   <h2 i18n:translate="">Site Error</h2>
   <p i18n:translate="">An error was encountered while publishing this resource.</p>
+  <tal:block tal:condition="is_not_found_error">
+    <p><strong i18n:translate="">Resource not found</strong></p>
+    <p i18n:translate="">Sorry, the requested resource does not exist.</p>
+    <p i18n:translate="">Check the URL and try again.</p>
+    <p><strong i18n:translate="">Resource:</strong> <span tal:replace="request/URL" /></p>
+  </tal:block>
+  <tal:block tal:condition="not: is_not_found_error">
     <p>
       <strong i18n:translate="">Error Type: <span tal:replace="options/error_type" i18n:name="error_type" /></strong><br />
       <strong i18n:translate="">Error Value: <span tal:replace="options/error_value" i18n:name="error_value" /></strong><br />
     </p>
+  </tal:block>
   <hr noshade="noshade" />
   <p i18n:translate="">Troubleshooting Suggestions</p>
   <ul>