bug#71386: 29.1; Frame is auto-deleted even when it has multiple tabs

[Juri Linkov]

>> Ok, here is a better patch:
>
> Thanks, but I think this should be controlled by a user option, since
> it's quite a drastic change in behavior.

I'm against adding useless options to tab-bar.el
since users can easily remove hook with 1 liner:

(remove-hook 'window-delete-frame-predicate-functions 
'tab-bar-window-delete-frame-p)