Hi community, I want to propose you some addition to assetManager and sceneOptimizer. If the solution already exist, said me   assetManager : 1. Get loading percent, not on x file loaded but on stream data loaded when it's possible.      > for more precision and to show state if you load some big files. 2. Add "abort" function and "onAbort" callback to cancel running tasks and loading files.      > Currently "clean" function delete tasks in assetMana