Shadowlings leaving z-level ends round

[Yogbot-13]

Round ID: 40362

Test Merges:

Not Supplied / None

Reproduction:

If all shadowlings enter a bluespace locker (Or I assume leave the z-level) it will end the round prematurely.

Submitted by: Cowbot (97736956326207488)

[Altoids1]

Making this not happen is slightly complicated since there's actually not a proper signal or component system for handling something like this. The nuke disk's /datum/component/stationlover thing doesn't exactly match up since the sling shouldn't really be able to, say, yeet into space repeatedly in order to teleport to arbitrary places on the station. I had a go at using COMSIG_MOVABLE_PRE_MOVE but that didn't really work either.

[Oblisk234]

Shadowlings no longer exist, see #20581