bug#25115: 26.0.50; ibuffer fails to show confirmation buffer when there are side windows

[Liu Hui]

> C-x 2
> C-x o
> M-x ibuffer
> m
> m
> D
>
> The confirmation buffer appears above the ibuffer buffer.  I doubt that
> such behavior is intentional but since I'm no ibuffer user ...

I have seldom noticed this because I usually do C-x 1 
(delete-other-windows) before operating buffers using ibuffer, but 
displaying the confirmation buffer above, or in other unrelated windows, 
is strange indeed.

IMO, displaying the confirmation buffer just above the minibuffer 
waiting for user input, or by splitting ibuffer itself (like Dired*), is 
better.


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* I just found Dired seems not to preserve the window height with the 
similar steps, and have submitted a bug report.