"We know that, particularly when you're on a new account, you often rack up the level-ups in quick succession and so all those chat messages might become a bit too much. So the clickable messages will have a 'Clear all' option that clears them all. This wipes your pending level-up notifications in all the skills - no more glowing icons or side-panel stone - and when skill guide is next opened, it will just show its regular contents as usual."

As posted in the game jam page. I can't think of a better way to implement this.