This unifies deletion behavior for all PartDesign features ensuring that
sketches that were used to create these features show after deletion and
that the tip is properly transfered.
Every basic data type is stored in Base module, color is standing out as
one that does not. Moving it to Base opens possibilities to integrate it
better with the rest of FreeCAD.
Double-click is already handled by PartDesign::ViewProvider::doubleClicked()
Overridings in Loft & Pipe brings no specific behavior
By removing overridings, behavioral consistency is improved both in ...
... undo commands & body activation management when PartDesign items ...
... are double-clicked
