App: support of method unsetupObject in Python feature classes

src/App/FeaturePython.h

@@ -53,6 +53,7 @@ public:
     bool onBeforeChangeLabel(std::string &newLabel);
     void onChanged(const Property* prop);
     void onDocumentRestored();
+    void unsetupObject();
     std::string getViewProviderName();
     PyObject *getPyObject();
 
@@ -94,6 +95,7 @@ private:
     FC_PY_ELEMENT(onBeforeChangeLabel)\
     FC_PY_ELEMENT(onChanged)\
     FC_PY_ELEMENT(onDocumentRestored)\
+    FC_PY_ELEMENT(unsetupObject)\
     FC_PY_ELEMENT(getViewProviderName)\
     FC_PY_ELEMENT(getSubObject)\
     FC_PY_ELEMENT(getSubObjects)\
@@ -341,6 +343,10 @@ protected:
         imp->onDocumentRestored();
         FeatureT::onDocumentRestored();
     }
+    void unsetupObject() override {
+        imp->unsetupObject();
+        FeatureT::unsetupObject();
+    }
 
 public:
     FeaturePythonT(const FeaturePythonT&) = delete;