SpeedCrunch full dark mode

[Patrik Johansson]

Why can't I make SpeedCrunch fully white-on-black?

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I love SpeedCrunch but I hate this limitation

[Tey']

Maybe we can add a way for users to specify a QSS file to apply to the main application window, so they can customize whatever UI parts they want (or use one of the many QSS files already available on the net). It might as well be integrated with current color scheme system like if there is a .qss file along the color scheme .json file, we apply the .qss file as well as the .json file.