* remove an error message if adding a sketchbased feature without a body
* add champfer or fillet old workflow support
Also rework finishFeature() so at least champfer and fillet may be
inserted into any place of any apropriate body(not only the active one) of the body.
When something was depending on a sketch (another sketch, for example),
padding (revolving, pocketing, etc) it was impossible. This is fixed.
Also, padding or revolving a single sketch twice was allowed (with a
warning msg displayed).
