bug#38164: quit-restore-window doesn't restore point in man

[Juri Linkov]

>>   M-x info               ;; don't type RET
>>   C-h f RET              ;; describe function 'info'
>>   C-x o C-x o            ;; switch to Help window
>>   <tab> <return>         ;; visit info.el from help link
>>   C-x o C-x o            ;; switch to minibuffer
>>   C-g                    ;; exit minibuffer
>
> And if the minibuffer appears on another frame, it will reset that
> frame as well.  We could make the behavior customizable with an option
> say 'exit-minibuffer-restore-window-configuration', t by default.

I'm not sure if I'll ever want to customize such a new variable
'exit-minibuffer-restore-window-configuration' to nil,
because sometimes it's desirable to restore a previous
window configuration, sometimes not.

But at least it could help to resolve the remaining problem in man.el,
if other solutions are not possible.