bug#50184: emacsclient -n should clear the minibuffer

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Wed, 25 Aug 2021 13:54:42 +0200
> Cc: 50184@debbugs.gnu.org
> 
> > That the date is still sitting there is weird.
> 
> When reusing the Emacs frame, it seems kinda natural to not touch the
> minibuffer area -- I can imagine that some people have work flows that
> depend on not losing the message.
> 
> Anybody got an opinion here?

I also don't see why emacsclient should produce the same behavior as
an internal command.  We only clear the echo area when the next
interactive command arrives, and emacsclient doesn't invoke any
commands interactively.