collection of blighted map bugs

1. blighted maps do not follow blight stash affinity
2. corrupted blighted maps can lose their "map area" resulting in being unopenable
3. corrupted blighted maps will not open with the twist of fate keystone allocated

Not quite bugs but probably should be fixed:

1. blighted maps and blight ravaged maps drop as random "Map Areas" instead of the map they were dropped in. (maybe we could implement some kind of favourite system...)
2. the loss of fossil chests has reduced blights overal chest variety. More chests are now "worthless"