Very handy, though the real solution to this is to shame plugin developers that use persistent notifications for things other than notifications.

When your plugin nags me to leave a review, or nags me to renew my subscription, or anything else up there that isn't a notification that my site is on fire, I start thinking of replacing you.

The other annoying thing that plugins do is create a root level menu item...because you're the only plugin that I've installed on this site, right? And your three-tab settings page is far too big to be placed in the Settings menu where it belongs, right?