Dismissing the Nautilus-internal deletion/restore notification
This notification is superfluous and annoying. That could be done way better.
It would be better if the trash entry of the sidebar could flash up and slowly dim down, so that it is ensured, that the users recognize that something got (maybe accidentially) deleted. The trash then should show a right-click-menu option for reverting that last action.
This also is even better as the current notification, because when it disappears after some time, you have to be aware that you must use "Ctrl + Z" – what may not be clear for beginners.
Benefits of the solution
No more annoying and superfluous notification we have to click away every time, about an action that in 99,9% of all cases was done on purpose.