Fixes issue where Crew Monitors can only detect suit sensors on z1

It was meant to only scan its own zlevel, but when AI crew monitoring was added, it was changed to scan only z1.

Which makes the monitoring console on mining go entirely against the purpose for which it was added, which was to find missing miners.

I also included some minor remapping on the mining bases to give more room in the medical area, and xeno warning signs for the northern outpost.