Mutations allow purification of prerequisites

[fakepass]

Describe the bug

It is possible to purify mutations without first purifying mutations that depend on them. (For example, you can purify Acidproof without removing Acid Blood.)

Steps To Reproduce

1. Give yourself an unpurifiable mutation with a prerequisite that does not turn into it, such as Amorphous Body.
2. Drink some purifier.
3. The prerequisite will disappear.

Expected behavior

Mutations prohibiting the purification of their prerequisites.

[int-ua]

Please verify with latest version.

[OliveChukar]

Tested in ver 0.E-9072-g1bb53ba-dirty with core content pack dark days ahead only. Was able to purify acidproof without loosing acid blood. I gave myself the mutation with debug then used purifier smart shot to remove the mutation if that matters.

[actual-nh]

Ideally, if a purifier would have randomly removed a prerequisite mutation, it would instead remove the mutation requiring the prerequisite.

[OliveChukar]

How to handle players intentionally doing odd things with the purifier smart shot? I think that if a player attempts to purify a prerequisite mutation it should also remove any dependent mutations.