Add Anticone and "Redness Catalysts" Fields

[ghost]

It can be useful to be able to clearly see the the anticone of a block, and in the case of a red block, the blocks that prevent it from being blue i.e. the blocks in its anticone which already have k blue blocks in their respective anticone.

For both of the above, as well as merge set, a clear visualization could be nice, where you could highlight the respective blocks in some way.