US2's handling of custom UI prefab interacts badly with KSPCF's fast scene switch patch

[JonnyOThan]

Details here: KSPModdingLibs/KSPCommunityFixes#273

For now, KSPCF will disable this patch when US2 is installed. That's not great, because this is one thing we can do to make scene switching a lot faster.

I haven't looked into what US2 is actually doing yet, but TweakScale Rescaled customizes the available UI prefabs here, and doesn't seem to have a problem with KSPCF's patch: https://github.com/JonnyOThan/TweakScale/blob/4719b9ff96521463b8b31b8488c1c6e61b891845/Source/HarmonyPatching/Squad.cs#L99