Open-edges will now work in simple cases where user selects bottom edge, without requiring adjustment to Final Depth. This will speed up procedural usage of the operation for open edges by re-enabling the `select-edge_create_OK` work flow.
The guessing procedure for Final Depth based on Base Geometry selected is fixed in `UpdateDepths()` method.
Improvements to user messages.
Remove unnecessary code and comments.
Improve debugging feedback.
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