[web session] fix potential key error on logout (occurs once the session has been transparently reconnected, hence session.sessionid and session.cnx.sessionid differs)
Latest changes --------------* table of `all latest changes`_Links below is providing useful RQL query example..._all latest changes: view?rql=Any+M%2CX+WHERE+X+modification_date+M+ORDERBY+M+DESC+LIMIT+30