With these changes, one face per solid can be added as either the first
"profile" or subsequent sections in loft and pipe.
This commit depends on `App::PropertyXLinkSubList` preserving the order in which
sections are added.
A minor change this also adds is that when a solid's face is selected that face
is mentioned in the fields instead of the solid (eg `Box:Face1` instead of
`Box`).
- Previously a subtractive pipe on a body with no solids would create a solid. Now Pipe will generate an error.
- Fix incorrect property header. Previously Pipe was identifying itself as Pad (copy paste error)
-Rename Sketchbased to ProfileBased to show new behavior
-Adopt ProfileBased to make the relevant helper functions work with faces too
-Adopt features for unified use of helper functions
-Adopt commands to allow face selection
They worked and are nice feature, but the handling with properties must be worked out better. To avoid any incompatibility due to property changes the functionality is removed now.
