Using JsonParser to generate JSON document to pass in the addItems signal & using roles instead of their names (compiler will complain if a role is not existent anymore).

mainwindow.cpp

@@ -329,10 +329,6 @@ void MainWindow::createUndoActions() {
   //  connect(m_showUndoViewAction, &QAction::toggled, this, &MainWindow::onShowUndoViewToggled);
   connect(m_showModelUndoViewAct.get(), &QAction::triggered, this,
           &MainWindow::onShowUndoViewToggled);
-
-  // TODO ? add a keyboard short cut?
-  //  m_showUndoViewAction->setShortcuts(QKeySequence::Copy);
-
   ui->menu_View->addAction(m_showModelUndoViewAct.get());
 }