created version diff

web/app/controllers/file_versions_controller.rb

@@ -1,4 +1,10 @@
 class FileVersionsController < ApplicationController
   active_scaffold :"file_version" do |conf|
   end
+
+  def restore
+    version = FileVersion.find(params[:id].to_i)
+    version.restore!
+    redirect_to edit_configuration_file_path(version.configuration_file)
+  end
 end