Comment 84 for bug 45843

Dan Duris: This is not about priorities. This is about grabbing keyboard events completely so that they are no longer received by any X client other than the popup owner - including window manager (kwin) and any other component of KDE.

This patch is of course an improvement of Qt library, but it will not SOLVE this issue.
Solution will be partial: popups created by Qt applications will stop blocking global shortcuts, but popups from GTK based applications won't.
This will cause the user experience to be incoherent.

And duplicates of this bug will continue to appear, because users do not care/understand why this will not work in GTK applications.

GTK has to fix this as well in the same way. But I wouldn't count on its developers.