Merge branch 'remove_duplicate_settings_link' into 'master'

Remove duplicate Settings link in admin area.

Fixes #250

See merge request !330

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

@@ -44,11 +44,6 @@
       %i.fa.fa-image
       %span
         Appearance
-  = nav_link(controller: :application_settings) do
-    = link_to admin_application_settings_path do
-      %i.fa.fa-cogs
-      %span
-        Settings
   = nav_link(controller: :applications) do
     = link_to admin_applications_path, title: 'Applications' do