show base feature's placement on load if not part of a body

src/Mod/PartDesign/App/FeatureBase.cpp

@@ -91,7 +91,13 @@ void FeatureBase::onChanged(const App::Property* prop) {
     Part::Feature::onChanged(prop);
 }
 
-
+void FeatureBase::onDocumentRestored()
+{
+    // if the base is not part of a body then show its placement property again
+    auto body = getFeatureBody();
+    if (!body)
+        Placement.setStatus(App::Property::Hidden, false);
+}
 
 }//namespace PartDesign
 

src/Mod/PartDesign/App/FeatureBase.h

@@ -48,7 +48,8 @@ public:
     }
     
     virtual void onChanged(const App::Property* prop);
-    virtual App::DocumentObjectExecReturn* execute(void);   
+    virtual App::DocumentObjectExecReturn* execute(void);
+    virtual void onDocumentRestored();
 };
 
 } //namespace PartDesign