Merge branch 'issue_14771' into 'master'

Hide top search form on the search page

Closes #14771

![Screen_Shot_2016-04-11_at_6.04.19_PM](/uploads/44cf2110bad29c0df06d874740a3a61f/Screen_Shot_2016-04-11_at_6.04.19_PM.png)

See merge request !3668

app/views/layouts/header/_default.html.haml

@@ -8,7 +8,7 @@
       .navbar-collapse.collapse
         %ul.nav.navbar-nav
           %li.hidden-sm.hidden-xs
-            = render 'layouts/search'
+            = render 'layouts/search' unless current_controller?(:search)
           %li.visible-sm.visible-xs
             = link_to search_path, title: 'Search', data: {toggle: 'tooltip', placement: 'bottom', container: 'body'} do
               = icon('search')