Minor game update

Game v4.1.4521

• Add: racer-class now being displayed per car-class (right top of screen) to match server system changes
• Fix: filtering tracks using onroad/offroad option in tracks selection screen
• Fix: replay 'video GUI' can be activated for MP hosted session with Ctr-F8 shortkeys
• Fix: minor logging adjustments to be able to catch game problems more accurately
• Fix: few possible game crashes under specific circumstances fixed