Medical Treatment - Allow variable CPR chance based on blood volume (invalidates old setting)

[pterolatypus]

When merged this pull request will:

• CPR success chance is interpolated between two settings, based on current blood volume
• Default values are the same to maintain current behaviour

I've left the old stringtable entries in for reference - is this a bad idea?

Interpolates based on blood volume between 60% (below this value you would immediately arrest again) and 85% (minimum threshold for waking up)

[kymckay]

I like what you're doing here functionally, but I think the settings aren't very transparent. It's fine for anyone like me who can read the code and see that "minimum chance" really means "chance at hemorrhage level 4 and "maximum chance" means at level 1.

I think they need to be presented in user terms "CPR success chance with high blood loss" and "with low blood loss" (or whatever in-game corresponding terminology we use).

[pterolatypus]

I think the settings aren't very transparent

Agreed. I'll try to think of a better tooltip, but it's hard to explain interpolation in a concise way.

[jonpas]

@mharis001 settings guru, please check.

[mharis001]

Should remove strings for old settings.

Although including the interpolation details may be too technical for setting descriptions, I think it is better to provide as much detail as possible so that the user can completely understand the behaviour from the description instead of leaving them to guess at exactly when the minimum and maximum values are used.