Tool reloads skeleton/actor when toggling spotlights in-game.

[Cy399]

Bug: The tool resets/re-reads the actor files whenever a spotlight is toggled in game during g-pose. This can sometimes lead to a tool crash due to an error

To Reproduce
Steps to reproduce the behaviour:

1. Go to Gpose with Anamnesis up
2. Click on the Camera Lighting buttons
3. Character/Actor icons will turn red as if the tool is re-reading the character files
4. Can lead to crash

Expected behaviour
This behavior has only happened with the newest version, this bug wasn't present in older versions.
2021-12-13-19-38-14.txt

[Yuki-Codes]

Yes, it looks like ana is losing track of the actor over and over again, and the crash seems like a race condition on a secondary thread.

[Yuki-Codes]

I've fixed the crash, and moved the flickering selection to its own issue: #686