Merge pull request #244 from foodcoop-rostock/fix-clean-session-on-logout

The original bug has really been annoying. Nice to have it fixed.

Tested it and found it fine. Should be finished now.

app/controllers/sessions_controller.rb

@@ -28,6 +28,7 @@ class SessionsController < ApplicationController
 
   def destroy
     session[:user_id] = nil
+    session[:return_to] = nil
     redirect_to login_url, :notice => I18n.t('sessions.logged_out')
   end
 end