bug#60210: 30.0.50; tab-bar height not recalculated when face changes

[Juri Linkov]

> 2) Enable tab-bar:
>
>    (tab-bar-mode +1)
>
> 3) Change some face attribute of tab-bar to force increase the tab-bar
> height, e.g:
>
>    (set-face-attribute 'tab-bar nil :box 4)
>    (set-face-attribute 'tab-bar nil :height 1.2)
>
> Result: the new face is displayed and the tab-bar height is properly
> adjusted to reflect the new height.
>
> 4) Reset face attributes of tab-bar to force original height, e.g.:
>
>    (set-face-attribute 'tab-bar nil :box nil)
>    (set-face-attribute 'tab-bar nil :height 1.0)
>
> Result: the new face is displayed, but the tab-bar height is not
> properly adjusted to reflect the new height.

It seems this is related to recent bug reports about fonts
such as bug#52493, bug#58912, bug#59271, bug#59285, etc.
since there is no such problem in Emacs 28.