Identified by MLampert. If multiple faces are selected at varying Z-heights, the `combineConnectedShapes()` method fails to connect them due to offset Z-heights. This fix places all input faces for that method into the same working plane.
When profiling open edges, the user must currently select a top edge and then set the Final Depth manually to a value below the selected edge(s).
This fix provides the user with feedback for the empty path generated.