Fix Plotly.react/Angular missing categories + axis tick labels#5345

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wbrgss merged 2 commits intomasterfrom

fix-5318-missing-axes-tick-labels

Dec 15, 2020

Commits on Dec 14, 2020

Only run emptyCategories loop when restyle or relayout calc flag is true
wbrgss
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Commits on Dec 15, 2020

Add test for categories/axes label preservation on Plotly.react(gd, ...)
wbrgss
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