bug#41852: 27.0.50; text-scale commands don't scale header of tabulated-list-mode

[Thomas Hisch]

Thx for working on a fix for this issue!

I've tried testing the patches, but without success. What I did was the
following:

start emacs -Q
M-x package-list-packages
M-x text-scale-increase

The text-scale-increase command doesn't have an effect on the scale of
the header line, but only on the scale of the date in the package table.

Does the above example rescale the font in the header line for you?

Regards,
Thomas
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