Certain applications send notifications that are relevant to see, but don't need to be kept around. Such notifications quickly populate the notification tray, making it hard to find persistent notifications that are more useful.
Is it possible to keep the notification pop-up, but prevent notifications from being sent to the notification tray? In particular, could this be specified per individual application?
I am using Ubuntu 20.04 (GNOME 3.36) and the extension Panel OSD.