bug#50798: 28.0.50; Tab line close button is off-center until it is highlighted with the mouse

[Juri Linkov]

>> Try starting Emacs with a larger font, then.  As in
>>
>>   emacs -Q -fn "FOO-18"
>>
>> where FOO is the font you get by default, like "DejaVu Sans Mono" or
>> something.
>
> I'm still not seeing any difference whether the mouse is over the x or
> not.

I can reproduce this with a very big font on the tab-line, but not tab-bar.