Proposal to improve session management.

[beKGB]

Closing the browser window without logging out the user first does not end the session.
When the browser reopens, the user must log in again to enter the application, but the previous session is not finished.
A cookie stored before the browser window was closed is still active and usable.

To summarize, a new cookie has been generated for the session, but it is possible to perform operations in parallel using the previous cookie.