I am migrating editor tools that rely very heavily on custom inspectors to work in 2019.1 and the new prefab workflow and I am running into , well, a lot of problems. The biggest being that changes made in our tools inside the prefab editor don't seem to be saved properly. Everything works fine in the old workflow, but not under the new system. Are there different ways we need to work in the custom inspectors and when adding/removing sub objects, or other data in the new system? Is there any documentation on this?