I updated to Catalina today and now my TeXstudio background is black. It looks nice sure, but whenever I click on a line, the line turns white and I cannot see what is written.
this unfortunately only solves the issue with one specific highlighting color. there are multiple problematic coloring/highlighting problems. e.g. black font on dark gray background etc
how to make texstudio use the normal light mode again? specifically without the "workaround" of switching to light mode in the OS itself