=act #3562: Do not generate Terminated when unwatched in preRestart

 - also avoid duplicate DWN for parent
(cherry picked from commit b0ab6f4)
Add MiMa filters for internal method tellWatchersWeDied
Merge pull request #1973 from drewhk/wip-3562-mistaken-terminated-backport-drewhk

=act #3562: Do not generate Terminated when unwatched in preRestart (backport)