Token "expired" when opening ajax live search in multiple tabs

[plantheo]

First of all I want to thank you for this incredible script.
I've founded this issue: when you open the ajax live search input in various browser tabs the token on the first tabs expires (the message "Error: Token mismatch. Refresh the page... etc" appears). That's because the $_SESSION['ls_session']['token'] is overwriten by the last opened tab. Is there a workaround for this?