title: How to prevent Devise from auto logout user on specific page?
body: <p>I have devise-based auth system on my RoR-site, and I need to auto sign out user after some time of inactivity. But also I have some pages on my site, that created to be opened for long time (user will just watch to page, where info is updated by ajax) and I want to NOT sign out user when this page is opened.</p>
  
  <p>Is anybody has a idea how to do that? Or how to tell Devise that ajax request is a user activity too?</p>