Fix deprecated plotting

Python throws a warning that the parameters

• norm
• extend are overwritten anyway and will be removed in future.

added 1 commit

• 49f87feb - Remove some deprecated parameters from colorbar()

Compare with previous version

You can also take a look at dune-common branch bugfix/remove_deprecated_matplotlib_parameters where I fixed this warning a few weeks ago but forgot to merge to master.

I'm not sure what is happening there:

In core/dune-common@785d3c78 you removed the parameters and now in core/dune-common@d6790bc8

you reintroduce them?

It this intended or am I missing something?

You're right - sorry about the confusion. I don't know what happened there with that MR.

Ah, alright. Can you let me know, when you update the MR? Or can this here simply go in?

I'm happy with merging this

Thanks! Can you do it? I don't have enough power :)

mentioned in commit 81eab61a

merged