Feature Request: Per-planet migration controls

[Praetorius]

Summary

Planets should let you set individual migration controls for each race, located somewhere in the planet interface windows.
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Components

1. A checkbox for each species in your empire, indicating whether or not that species is allowed to migrate to the given planet.
2. A checkbox indicating the default setting for the above for any new species added to your empire. i.e. by default, new species will either be allowed or disallowed from migrating to a planet.

Reasons

1. I'd like to be able to have robot-only planets like I did a few patches ago. The only way to do this is to ban all my bio pops from migrating (global setting).
2. If I'm a militarist, materialist empire that conquers a planet full of pacifist, spiritualist pops, I might decide to avoid pissing them off by allowing opposite ethics-having conquerors to move into their planet.

 

[scaper12123]

I'm all down for per-planet migration, although I would be curious to know the technical limitations this would present. What the game really needs right now is a migration limitation on habitibility, so I don't colonize a tomb world with a tomb-world-ideal species and suddenly have to give a thousand iphones to every other random species who decided living in a nuclear was as top of an idea as it first sounded.