bug#41343: [External] : bug#41343: tab-bar-mode: Close tab on mouse-2 click

[Drew Adams]

> It's too late to change how keys are implemented for tab-bar.
> The tab-bar keymap contains such keys as 'tab-1' and 'C-tab-2',
> and clicking mouse-1 on tabs emits such events.  It doesn't emit
> 'mouse-1' and 'mouse-2'.

IIUC, tab-bar is not in any Emacs release, the most
recent of which is Emacs 27.2.  If that's correct,
how is it that it's too late to change something in
the implementation or design of the incipient Emacs
28 feature tab-bar?

Just asking.  A priori, I don't care one way or the
other about how tab-bar implements keys, and I don't
know how it does that currently.