AES encryption with a key derived from the user password

This css class fix the location of the content of the page in the correct css-grid location, instead of leaving the content free

The logout page is loaded to clear the session because, in the case of time missmatch between the server and the client, the ression could be reset to the default time (get request before the server reach 0)

The size of the border is not part of the input width, and has to be removed