Add post-qualification timer for Multiplayer

Currently we have a 90 second timer for the end of race, just to let everyone finish their race after the chequered flag. We would also like a similar 60-90 second threshold timer for Qualification. People who are on their way finish their lap but qualification ends abruptly after practice timer resets to 0. Or people who are on their lap after the timer ends to 0 should be given the chance to end their con-current lap.