* Suppress to split cut objects
* ObjectList:
* Use another icons to mark the cut objects and connectors
* For the cut object show parts, which are not connectors
* Set different colors for the Plugs and Dowels
* CutGizmo:
* Invalidate CutGizmo after changes in ObjectList or perform a cut
* CupPlane in Connectors mode: Unselect selection, when click on empty space
* Connectors mode: Fixed performance issue
