bug#57468: 29.0.50; Text cursor continues to blink when frame loses focus

[Eli Zaretskii]

> Cc: 57468@debbugs.gnu.org
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Tue, 30 Aug 2022 12:27:00 +0200
> 
> Could it be the window manager that's not sending Emacs the de-focus
> event (or whatever it's called)?

That should be easy to verify by binding a command to the event that
will display the event.  The focus-in "pseudo-key" is defined in the
special-event-map.