A small update with minor bugfixes, a few new avatars and a slight AI brake handling change.

v1.2.3 (2020.03.29)
- Adjust how AI handles braking in the corners
- Fix setting muffler or supercharger sound to None in Car Editor not working properly
- Fix error caused by trying to load Workshop car when it didn't exist on disk
- Fix a rare bug that caused track loading failure when there was a mission with hittable objects
- Handle deleting a custom car causing exception when any of the car files are open and preventing the deletion
- Handle some edge case exceptions in track leaderboard loading
- Add Houtworm and Carcassam avatars