Cameras sometimes break when interacting with the overmap

This is related to various independent issues, such as the overmap viewscreen, but also fighter cameras not working as intended.

## Round ID:

5468, among others

## Testmerges:
Not currently relevant

## Reproduction:
One known issue:
1. open a camera console which spawns a controllable AI-eye (xenobio consoles function like this too)
2. open overmap viewscreen (possible by staying next to one and having the tile selected)
3. close both consoles, starting with the regular camera console (you should have two buttons)
4. Your mob will now be at the location of the overmap viewscreen's camera

Start by reproducing the listed camera-console and overmap viewscreen sequence from Round ID 5468. Trace how each console creates, stores, and closes its controllable camera, then compare the resulting mob location with the expected location. Done means closing both consoles no longer moves the mob to the overmap camera location.

Written by the indexing model from the issue text.