App: fix property ordering problem when undo/redo (#3255)

* Part: fix Placement/Shape onChanged() handling

* App: fix property ordering problem when undo/redo
See https://tracker.freecadweb.org/view.php?id=4265#c14271

* Gui: fix undo/redo signaling
Make sure to signal after all properties has been restored

src/App/DocumentObject.cpp

@@ -267,6 +267,10 @@ std::string DocumentObject::getFullName() const {
     return name;
 }
 
+App::Document *DocumentObject::getOwnerDocument() const {
+    return _pDoc;
+}
+
 const char *DocumentObject::getNameInDocument() const
 {
     // Note: It can happen that we query the internal name of an object even if it is not