I want to move my mode-line to the top of each window. So, I've copied its contents into the header-line.
(setq-default header-line-format mode-line-format) (setq-default mode-line-format nil)
But, I'm using the modus themes, so the selected window's mode-line shows with different faces.
How can I copy the faces of a window's mode-line to its header-line?