Undo stat spending

A few times now I have missclicked a stat buying 1 or 2 of agility on a caster for example. Not the end of the world I know but it would be nice to have a 5 sec window to undo. Or maybe like the old system where I can undo an action until I close the menu.

(I didn't see a way to do this so if it exists already then I'll git gud and use it)