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/Mod/Part/Gui/ViewProviderExt.cpp

@@ -840,6 +840,12 @@ void ViewProviderPartExt::updateData(const App::Property* prop)
 {
     const char *propName = prop->getName();
     if (propName && (strcmp(propName, "Shape") == 0 || strstr(propName, "Touched") != nullptr)) {
+        TopoDS_Shape cShape = Part::Feature::getShape(getObject());
+        if(cachedShape.IsPartner(cShape)) {
+            Gui::ViewProviderGeometryObject::updateData(prop);
+            return;
+        }
+
         // calculate the visual only if visible
         if (isUpdateForced() || Visibility.getValue())
             updateVisual();
@@ -918,6 +924,7 @@ void ViewProviderPartExt::updateVisual()
     haction.apply(this->nodeset);
 
     TopoDS_Shape cShape = Part::Feature::getShape(getObject());
+    cachedShape = cShape;
     if (cShape.IsNull()) {
         coords  ->point      .setNum(0);
         norm    ->vector     .setNum(0);