Gui: modernize C++: use equals default

src/Gui/DlgAddProperty.cpp

@@ -56,8 +56,8 @@ DlgAddProperty::DlgAddProperty(QWidget* parent,
 
     std::vector<Base::Type> types;
     Base::Type::getAllDerivedFrom(Base::Type::fromName("App::Property"),types);
-    std::sort(types.begin(), types.end(), [](Base::Type a, Base::Type b) { return strcmp(a.getName(), b.getName()) < 0; });
-
+    std::sort(types.begin(), types.end(), [](Base::Type a, Base::Type b) { return strcmp(a.getName(), b.getName()) < 0; });
+
     for(const auto& type : types) {
         ui->comboType->addItem(QString::fromLatin1(type.getName()));
         if(type == defType)
@@ -72,10 +72,7 @@ DlgAddProperty::DlgAddProperty(QWidget* parent,
 /**
  *  Destroys the object and frees any allocated resources
  */
-DlgAddProperty::~DlgAddProperty()
-{
-    // no need to delete child widgets, Qt does it all for us
-}
+DlgAddProperty::~DlgAddProperty() = default;
 
 static std::string containerName(const App::PropertyContainer *c) {
     auto doc = Base::freecad_dynamic_cast<App::Document>(c);