Edges Disappear When a Workplane is Placed on a Face

[jmwright]

Steps to reproduce.

1. Create a new component.
2. Place a box with the default parameters.
3. Add a selector to select the topmost face in the Z direction and place a workplane on that.
4. Observe how the edges of the box are no longer displayed.

[jmwright]

Fixed in commit a9bdb11