We've all run into this: a junction node sits right on top of a wire — visually it looks like part of the flow — but it isn't actually connected to it. Finding these cases currently takes a lot of effort, because nothing in the editor distinguishes a junction that's properly wired from one that merely overlaps a wire. The nasty case is a junction with exactly one connection (one wire in and nothing out, or vs.). A junction with zero connections is at least somewhat visible, since it usually sit...