[MERGED PR] Wraith salt rework

[Gomp]

I really like the idea of being safe inside a salt circle but won't line of sight just mean if there is any salt the wraith can't do anything? My understanding is that this would just be either way too strong a tool against a wraith if wraith abilities only clear single salt piles or just not much of a change if a wraith can just delete all the salt on screen by spending some points.