PartDesign workflow without part/body

PartDesign: make datum features work outside of body/part
PartDesign old workflow: remove a few messageboxes about no part
PartDesign: old workflow: multitransform without body

Still has visibility issues, but generally works.

src/Mod/PartDesign/Gui/TaskTransformedParameters.cpp

@@ -182,7 +182,7 @@ App::DocumentObject* TaskTransformedParameters::getPartPlanes(const char* str) c
 
     //TODO: Adjust to GRAPH handling when available
     App::DocumentObject* obj = getObject();
-    App::Part* part = getPartFor(obj, true);
+    App::Part* part = getPartFor(obj, false);
     
     if (part) {
         std::vector<App::DocumentObject*> origs = part->getObjectsOfType(App::Origin::getClassTypeId());