Update: Race ends when all drivers have finished

It wasn't easy since there is a lot of logic in the game affected but we do agreed with the players that it has to be changed and here is !

Build 2273324 changelog:

• Last lap: "Hurry Up!" message

• When there is a winner: "Race ended" message

• When there is a winner: 20 seconds time out to finish the race or all racers reach the finish line.

• When there is a winner: Each racer have a checker flag in the HUD

• Added best lap time and current lap time (lower right corner) visible only in single-player mode

• Improved sound cycling, fade-in, fade-out and performance hit on End Season screen.

We love to improve and add features requested by users :)