1.Remove category column when category is specified

2.Showing category if not in category browsing
3.Redirect to home and show error if app page is not available for user language
4.Showing no context to display if object has no language for it.
5.Browse new and announcement by unit is now applicable.

app/views/layouts/page_layout.html.erb

@@ -12,6 +12,17 @@
 	<%= page_javascripts(@item).html_safe %>
 </head>
 <body>
-	<%= yield %>
+  <%= yield %>
+  <% if !flash.empty? %>
+    <div class="modal alert alert-error hide" id="myModal">
+      <p type="button" class="close" data-dismiss="modal">×</p>
+      <% flash.each do |key, msg| %>
+          <%= "<strong>#{msg}</strong><br/>".html_safe%>
+      <% end%>
+    </div>
+    <script>
+      $('#myModal').modal('show')
+    </script>
+  <% end -%>
 </body>
 </html>