applets/notifications: Different workaround for layout bugs
Don't set a preferred width which may cause an infinite resize loop. Invoking a particular undocumented slot will force the layout to be reevaluated and all items resized again, making fillWidth actually work
(cherry picked from commit f0475b8a)
05440835 applets/notification: Different workaround for layout bugs
Co-authored-by: Marco Martin notmart@gmail.com