bug#73862: [PATCH] Add `header-line-active` and `header-line-inactive` faces.

[Aaron Jensen <aaronjensen@gmail.com>]

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I bisected and found that this patch caused a regression in header-line
formatting. I don't have the exact reproduction steps yet, but the gist is
that I use a header-line with multiple faces in one window, then open a new
popup window that has no header-line. The original window's header-line
will get its faces changed slightly, but it's hard to tell how.

Here's a video demonstrating it: https://share.cleanshot.com/CD9PtVv3

You can see that the padding on the left of the header line goes away and
the line numbers change to a variable pitch font. If I adjust my font size,
the header line redraws with the proper faces. This will happen randomly,
but I can force it with the font size change reliably.

I'll see if I can narrow reproduction steps, but it may be worth
considering a revert for now.

Thanks,


Aaron

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