[tex4ht] underline math does not work in tex4ht when in mathjax mode

[Michal Hoftich]

Hi Nasser,

> Is this a mathjax issue itself or make4ht is not doing
> something right?

It is definitely MathJax issue, but I am not sure if they can fix
that. Only commands in math are being passed to MathJax, so it would
need to detect font properties of the surrounding text to detect if
the current text is underlined.

Best regards,
Michal