bug#58728: 29.0.50; Minibuffer does not follow tabs

[Juri Linkov]

>>     1. emacs -Q
>>     2. C-x t 2
>>     3. M-x
>>     4. C-x t o
>>     5. M-:
>>     6. C-x t o
>>
>> what minibuffer should be displayed?  Probably the last.
>
> I think showing the most "recent" minibuffer should be shown.  If we go
> by minibuffer-depth-indicate-mode, then the most "recent" minibuffer
> would be the labelled 2.

As soon as someone will point out to a function that does this,
it could be immediately added to tab-bar.el.  What is needed is
something to work in such situation:

    1. emacs -Q
    2. M-: (setq wc (current-window-configuration))
    3. M-x
    4. M-: (set-window-configuration wc)
    5. ???
    6. The minibuffer with its window is restored and reactivated.

Maybe something like what frameset-to-register/jump-to-register does,
that restores the minibuffer, but doesn't reactivate it.