Fix plotting tools

[rs028]

A little time to kill in between flights... this is meant to resolve the issues in #269.

[codecov]

Codecov Report

Merging #490 (d7a20b6) into master (739879e) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #490   +/-   ##
=======================================
  Coverage   66.81%   66.81%           
=======================================
  Files          17       17           
  Lines        2046     2046           
=======================================
  Hits         1367     1367           
  Misses        679      679           

Flag	Coverage Δ
build	52.81% <ø> (ø)
tests	67.17% <ø> (ø)
unittests	54.86% <ø> (ø)

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[rs028]

@spco, this is starting to be annoying... in PR #482, all the macos tests fail. On this PR only one test for macos12 fails (and for a different reason... the codebase is basically the same! 😡

[rs028]

I will merge this, even though thte tests fails, since it only changes the plotting tools, which are independent from the rest of the code.