made settings localized in orbit backend

app/helpers/orbit_backend_helper.rb

@@ -406,7 +406,7 @@ module OrbitBackendHelper
     site = Site.first
     case controller.controller_name
       when 'sites'
-        res << "<li>Site Settings#{divider}</li>"
+        res << "<li>#{t(:settings)}{divider}</li>"
         case controller.action_name
         when 'sitemap'
           res << "<li class='active'>#{t(:sitemap)}</li>"