Latex labels work intermittently - Mathjax invocation still hinky

[thclark]

If plotly renders the figures before mathjax's configuration has run correctly, latex labels don't get rendered.

Solution will be to hook the invocation of plotly (in charts.js) to the startup hook of mathjax like in this answer so we can be certain pmathjax is available.

As a bonus that allows us to get rid of the duplicate script annoyance here

[klunkean]

Is there a workaround for this?

[thclark]

not yet, but I definitely will accept a PR that fixes it, because I'm still having it pop up too!

[thclark]

I think this might be fixed by the addition of the extension in 0.1.0 - need to check.