[StrangePan][2.0.25] Demolisher kill by nuclear reactor not registered

[fexatious]

I killed my first small demolisher by luring it into a pair of running nuclear reactors with gun turrets. After many save scums, the explosion killed it. I did not get the "If it bleeds, we can kill it" achievement and it did not register in the kill log. The attached save is from a couple of seconds after it dies, with minable segments still present.

[boskid]

It looks like the reactor's meltdown trigger is passing demolisher as the `cause` while reactor itself is a `triggerer`. By changing cause onto a reactor i can see the achievement is being properly given. Since i am not familiar with triggers i will leave this for Dan to apply a fix.

[StrangePan]

There was a rewrite to how damage causes were tracked throughout the engine, and the changes to reactor meltdowns don't really make gameplay sense. This will be fixed in 2.0.33.