fix traceNames with frames

[FrankBornais]

• Fix Subscript out of bounds error when trying to combine segment and markers with frame #1618
• Fix Error subscript out of bounds: registerFrames with simple and cumulative animation on same plot #1903

[cpsievert]

Thank you!

If you don't mind, a NEWS item would also be helpful.

[cpsievert]

Hmm, do you know what's going on with these differences?

[cpsievert]

Oh I think they might be a result of #1927?

[FrankBornais]

Oh I think they might be a result of #1927?

Yes that's it. Since it kept only 6 symbols to remove an unnecessary warning in the tests... If you want me to undo that just let me know.

[cpsievert]

I think most of the changes are fine except for tests/figs/subplot/subplot-bump-axis-annotation-traces-shared.svg and tests/figs/subplot/subplot-bump-axis-annotation-traces.svg. It looks like you added a type = "scatter" when it really wasn't needed (doing so adds an extra empty trace) -- would you mind reverting that change?

BTW, thank you for updating these visual baselines!!

[cpsievert]

Thanks!