Shape intersection improvements

Still working at fixing and improving the application usage use case. The shape intersection algorithm integrates well with Extrude so that after an intersection shape is extruded if more shapes are added to the intersection the initial Extrude is not affected and refers the same base shape. Will continue testing its integration with Cut, also planning to hide the shapes on which a Feature like Extrude is applied. The Face Generation/Groping and Ungrouping will also be checked to see if it works well and then move to Fillet2D.