- fix islands not waking when a particle is disabled
- fix waking of isolated particles when all other particles or constraints have been removed from their island
1) We were not waking islands on removal of a particle. 2) We were destroying single-particle islands before the sleep status was processed, preventing particles from being awoken when the penultimate particle was removed from an island.
The fix is to explicitly wake islands on particle removal, and to defer island/node destruction until FinalizeIslands, after we have processed sleep/wake changes and synched the sleep state to particles.
#rb benn.gallagher
[CL 27964398 by chris caulfield in ue5-main branch]
fbbe389515