fix traceNames with frames - #1932

Thank you!

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

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

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

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.

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!!

Thanks!