Changelog:
-Improved track builder performance
-Fixed some roads having wet material in track builder
-Fixed adding road nodes orientation being wrong after using scale or rotate
-Fixed default keyboard throttle & brake bindings not working
-Fixed inputs not working in test drive after driving in practice/quickrace
-Toned down bird ambient audio
-Various fixes & improvements

Past couple versions introduced a bug that causes performance drain in track builder. Performance now is overall better but the original cause is still unknown.