[CLOSED PR] Reverts 93bee53 and associated changes, adds observers to the respawn ...

[Wisemonster]

I agree with the idea of letting observers respawn/be a part of respawn events, but with reduced priority over players that died over the course of the round. I also think that, as ZeWaka said, both rp and classic should follow the similar rules when it comes letting observers respawn, whether that be preventing or allowing.