Support back link on non resource links

app/helpers/dunlop/application_helper.rb

@@ -109,7 +109,21 @@ module Dunlop
     end
 
     def page_title_for_string(args)
-      args.first
+      title = args.first
+      options = args.last.is_a?(Hash) ? args.last : {}
+      if back_options = options[:back]
+        url =
+          case back_options
+          when Array then polymorphic_path(back_options)
+          when true then :back
+          else back_options
+          end
+        if url
+          back_link = link_to content_tag(:i, nil, class: 'left arrow icon'), url, class: 'title-back-link'
+          title = [back_link, title].join.html_safe
+        end
+      end
+      title
     end
 
     def page_title_for_resource(args)