add rebuild the status of filefield in the mongo.

fix the problem about copying dir when lacking that dir.

app/controllers/admin/patchfiles_controller.rb

@@ -21,7 +21,13 @@ class Admin::PatchfilesController < OrbitAdminController
   end
   def edit
 	params["filefield"]["file_show"].each do |name,status|
-		@file_to_show.file_show[name][:status] = status.to_i
+		@file_to_show.file_show[name][:status] = status.to_i rescue nil
+	end
+	if params["filefield"]["refresh_btn"] == "true"
+		@default_field = Filefield.new()
+		@file_to_show.file_show = @default_field.file_show
+		@file_to_show.save
+		redirect_to admin_patchfiles_path and return
 	end
 	params["filefield"]["sub_file_fields"].each do |name,files|
 		files.each do |index,file_and_status|