Placing an angle can cause strange node label background sizing

[JulieWinchester]

Steps to reproduce:

1. Load a mesh
2. Place three nodes
3. Place two edges with one node in common
4. Place an angle between the two edges
5. Create three additional edges.

The third additional edge (i.e., edge 6 overall) will have bugged extra-wide light gray background behind the dark gray background. Weird!