#4 Fix text highlight color in dark mode

I attempted to use the appropriate selector (selection) for this in the CSS I’m applying to the textview, and it made no difference.

It’s worth noting in my theme this isn’t an issue as the text selection colour is blue, but if we’re taking over the styling there we should be ensuring the text selection colour contrasts enough to be visible.

I can look into this some more but that would probably take some time.

I tried several things, and I am not succeeding in getting the selection to show up.

Do you mind if I look into a way to remove the darkmode toggle button from the UI if the current theme doesn’t have one? Because it works when the theme defines a darkmode.

Nope, that works for me.

Fixed, though what I’ve managed to implement adds a couple seconds onto the startup time.

For performance it’d be better to reimplement a bit of GTK, though that risks getting the test wrong. The good thing about the approach I used is that it can withstand changes to GTK+.