SUMMARY

When clearing all notifications by clicking the hourglass button, the notifications popup closes without any feedback that the notifications were cleared. It would be good to have a visual indication that the notifications in the popup were actually removed.


STEPS TO REPRODUCE
1. have some permanent notifications
2. click the notifcation symbol and see the list of notifications
3. click the hourglass button to clear all notifications

OBSERVED RESULT

The popup closes without any visual indication what the button did and if actually *all* notifications are removed.

EXPECTED RESULT

Removing single notifications or all notifications from one application by clicking the x button shows a short animation of the notifications being removed. Clicking the hourglass could also show a short animation or the empty list for a short time before closing the popup. This would easily make clear, that the button did what it is supposed to do.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.23.0
(available in About System)
KDE Plasma Version: 5.23.2
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2