improved night mode

[quantenschaum]

Improve the display of charts in night mode by applying CSS filters to the map canvas.

This can be achieved in the user.js user.css by adding

.nightMode .ol-layer {
  filter: invert(100%) hue-rotate(180deg);
}

The brightness is inverted and the hue rotation keeps the colors correct. The brightness can still be reduced as usual.

[wellenvogel]

Cool.
Should also be possible simply by using the user.css.

[quantenschaum]

I was not aware that this exists, that's even easier. It would make sense to disable this feature for charts that already come in a night theme.

[wellenvogel]

good point. So maybe I should add some css class that has an identifier for the chart so that you can select based on this one.