macOS: black/white menu bar icons

[tjarksaul]

Most macOS apps support black/white menu bar icons. The green checkmark is very distracting, there should be a black/white option as well.

[svengreb]

Taking a quick look into the repository it seems like there are already black/white variants, e.g. [email protected]. I'm not that familiar with with the macOS specifications for such resources, but I guess there are system APIs to detect the system-wide preferences (light/dark mode) that can be used to decide which variant should be used. A a start a new setting could be added that allows users to manually select the color variant. Maybe using a SVG could also be added instead which can be colorized dynamically.