Revert "Create a CallbackBatch around Udpate/FixedUpdate/Start, so inner calls don't create their own, and callbacks all get called at the end" This reverts commit 7dd50b001d043165f5389e4dcb64e8fcbc6faabd. Revert "Make CallbackBatch 'safer' by making it always require a scene" This reverts commit f3fdd37d24ebbaf66cbb92b47582e6a12a559532. Re-apply OnPropertyDirty fixes