Being able to close a notification with a middle button click.
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/2101
Git commit 1119f6fb59c703ad71db0737f2ac7962738e66a0 by Kai Uwe Broulik.
Committed on 11/09/2022 at 07:38.
Pushed by broulik into branch 'master'.
Notifications: Close notification popup with middle click
M +12 -2 applets/notifications/package/contents/ui/NotificationPopup.qml