bug#34939: Some minibuffer behaviour is annoying

[Juri Linkov]

>> Another variant is to extend 'echo_area_display' to use
>> 'minibufer-message' in case of the active minibuffer.
>
> I think I'd like that. Guess the only downside is having to decide
> whatever's going to happen when the current minibuffer contents are too
> long for the area to accommodate both them and the message?

I see no downsides - using minibuffer-message already does the right thing:
it resizes the minibuffer area.