notifications/NotificationItem.qml: use implicitWidth only when grouped
Outside of group this will cause the notification to shrink, but if preferredWidth is completely removed, inside the group it will take too much space and make the buttons out of screen.
(cherry picked from commit aa77ae7d)
9ebb3009 notifications/NotificationItem.qml: use implicitWidth only when grouped
Co-authored-by: Akseli Lahtinen akselmo@akselmo.dev