Add missing cohorts to tab nav

app/views/layouts/nav/_admin.html.haml

@@ -5,7 +5,7 @@
   .fade-right
     = icon('angle-right')
   %ul.nav-links.scrolling-tabs
-    = nav_link(controller: %w(dashboard admin projects users groups builds runners), html_options: {class: 'home'}) do
+    = nav_link(controller: %w(dashboard admin projects users groups builds runners cohorts), html_options: {class: 'home'}) do
       = link_to admin_root_path, title: 'Overview', class: 'shortcuts-tree' do
         %span
           Overview