[A15c] Can't start new game when a scenario exists with a modded ScenPart

[Orion]

This is an issue with the scenario list (and not mods per se).

When a scenario is added or saved that contains a ScenPart from a mod that is not installed or enabled, opening the scenario list ("New Game") will throw an exception and the user will not be able to start new games anymore.

RimWorld should be able to fall back when it can't instantiate a ScenPart and just skip it gracefully and possibly point this out to the user.

This thread is about said issue, including a solution to users experiencing the problem:
Topic: Can't Creat colony anymore !!