The source project of this merge request has been removed.
Use WAYLAND_DISPLAY and DISPLAY instead of XDG_SESSION_TYPE
This is a backport of https://codereview.qt-project.org/c/qt/qtbase/+/259186
Since distros are switching to KDE's patch collection, it would be really nice if Qt 5 apps will run without setting extra variables on lightweight environments like sway. :)