gridplot without coloring

[jpthiele]

It would be nice to be able to say cellcoloring=:none and also disable plotting of boundary regions.
Especially, when building more complex custom plots the overall image can be visually overloaded.

I'd be happy to look into the cell coloring today but for the boundary regions we would need another keyword, right?

[jpthiele]

I could not figure it out and region_cmap being part of GridVisualizeTools also does not help too much.
@j-fu maybe you have a spontaneous idea?
Otherwise I guess the easiest approach would be to expose the region and boundary maps as kwargs even though that means touching a whole bunch of code.