WIP: reconstruct layouts

* page_alerts

lib/views/widget/page_alerts.html

@@ -61,7 +61,7 @@
     </div>
     {% endif %}
 
-    {% if not page.isLatestRevision() %}
+    {% if page and not page.isLatestRevision() %}
     <div class="alert alert-warning">
       <strong>{{ t('Warning') }}: </strong> {{ t('page_page.notice.version') }}
       <a href="{{ page.path }}"><i class="icon-fw icon-arrow-right-circle"></i>{{ t('Show latest') }}</a>

resource/styles/scss/_on-edit.scss

@@ -2,6 +2,7 @@ body.on-edit {
 
   // hide unnecessary elements
   .navbar.navbar-static-top,
+  .row.row-alerts,
   .row.page-list,
   .row.page-comments-row,
   .row.page-attachments-row,