Improve indicator and overlay contrast color

[luisbocanegra]

Tints them using background color from color scheme.

Caveats: Requires a Plasma theme that uses backgroundColor from color scheme as panel bg color.

Solutions for that could be:

• Getting the tint color from the panel somehow
• Manually indicate whether the panel is dark/light
• To get it from color scheme
• Some of the above as options

For some reason indicator color requires closing task to update correctly, not sure if was like this before and this just made it more prominent

before

after

[alexankitty]

A lot of the changes I make require hitting OK to actually reload things, there's probably a better implementation for reloading the plasmoid layout, but I've not figured it out yet. Let's not merge this until we have a better solution for detecting light and dark.

[alexankitty]

Checking against PlasmaCore.Theme.backgroundColor is probably what we want to do.

[alexankitty]

Breeze Dark Breeze I set the indicator specifically to the backgroundColor to demonstrate.

Testing against a bunch of themes, I don't really see an issue with this approach. I'm also not even sure if it is possible to have a plasma style that doesn't have a background color.

[luisbocanegra]

Just tested my changes with PlasmaCore.Theme.backgroundColor and it seems to work fine with the themes I have

[alexankitty]

If you're happy with the result, then I'm good with merging it.

[luisbocanegra]

I think it is good enough in terms of contrast. I feel light themes result in very dark indicators for some applications but is not a bid deal and could work on improve that later in case you merge this as is now :+1:

[alexankitty]

I'll go ahead and get this merged, thanks! We can definitely revisit making the indicators a little more I guess... light even? But it should be fine for now.