'about' navigation highlight set explicitly

ordr2/templates/layout.jinja2

@@ -47,7 +47,7 @@
               {% else %}
                 <ul class="nav">
                   <li {% if context.nav_highlight == 'register' %} class="active" {% endif %}><a href="{{request.resource_url(request.root, 'register')}}">Register</a></li>
-                  <li {% if not context.nav_highlight %} class="active" {% endif %}><a href="{{request.resource_url(request.root, 'about')}}">About</a></li>
+                  <li {% if context.nav_highlight == 'about'  %} class="active" {% endif %}><a href="{{request.resource_url(request.root, 'about')}}">About</a></li>
                 </ul>
                 <form action="{{request.resource_url(request.root, 'account', 'login')}}" method="post" class="navbar-form pull-right">
                   <input type="hidden" name="csrf_token" value="{{get_csrf_token()}}">

ordr2/views/pages.py

@@ -19,6 +19,7 @@ def welcome(context, request):
     renderer='ordr2:templates/pages/welcome.jinja2'
     )
 def about(context, request):
+    context.nav_highlight = 'about'
     return {}