Highlighted math in dark mode is hard to see

[Jürgen Spitzmüller]

Am Samstag, dem 23.09.2023 um 21:21 +0200 schrieb Daniel:
> Is there a reason why the "selected text" color is not applied to
> maths? 
> Changing that would solve the problem since this color is visible on
> a 
> "selection" background. (I guess that is its point.)

Or maybe introduce a Color_selectionmath. I think this could be easily
implemented for 2.4 without having to fear collateral effects.

-- 
Jürgen