White/Black line automated switch with Light/Dark Mode

[francescoragazzi]

First of all, thank you so much for giving us such an amazing piece of software! Hopefully this is a small quality of life improvement suggestion that is worth your time.

Is your feature request related to a problem? Please describe. When switching from Light to Dark mode, any graph with a 100% black line becomes invisible in a black background and need to be manually changed to another value (in my case 100% white). Same problem from Dark to Light.

Describe the solution you'd like When switching from one mode to the other, 100% white and 100% black lines should switch to their respective inverted colors.

Describe alternatives you've considered Currently you can do this manually, but it's tedious.

Additional context I like to switch mode depending on the time of the day, so the switch is quite regular.

Thank you so much!!