Cattle coat: proper on/off inbreeding for the pattern
- Swapped the old Bias Strength slider for a real Inbred toggle,
so it works the same way inbreeding does everywhere else (on/off,
not a dial)
- Not inbred keeps the bias map's painted white/dark grey zones,
inbred drops to just the seam mask and lets the rest go to noise
- Split the edge softness into two sliders (dark edge / white edge)
so softening the white mask border doesn't also soften the dark
edge and dim the whole body
- Fixed a bug where switching Inbred on changed how busy the pattern
looked overall, not just the zones it's meant to affect
- Pattern tester and material inspector both updated to match, so
this can be tweaked and previewed without a real animal
- Fixed a few tests that broke from the renames