notification-frame: Animate rest of the notifications after one is dismissed

There is a lack of animation on the rest of the notifications after one is dismissed. Right now there is no transition and it's just an immediate change to the UI. An animation that slides up the rest of the notifications into the space that the one that was just dismissed from would be nice here.

Demo

Screencast_from_2024-10-04_20-19-40

Helps: #788