fix zero and negative value for grouped barcharts#93

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manuel-rubio wants to merge 3 commits intomindok:masterfrom

manuel-rubio:master

Commits on Jan 25, 2024

fix zero and negative value for grouped barcharts
manuel-rubio
committed

Commits on Feb 4, 2024

remove unclear code and keep it simpler for setting zero and negative values for grouped barcharts
manuel-rubio
committed

Commits on Feb 6, 2024

zero axis (as @mindok suggested)
manuel-rubio
committed