That is because when this article was written, a specific set of libraries were used including Core Components.The screenshot of dialog is from OOB Core Components Form Container which has evolved over a period of time. You should be able to find appropriate docs for core components that describe this.
It should not restrict you to choose specific 'action type' which is now available in the 'properties' tab of your screenshot.
I can still see formstart as a hidden param in container.html
The form container that comes with the AEM64_PersistJCR is not having a start or end option. Only the form container from the component group Forms is having a form start and end as specified in the tutorial. And it has the advanced tab also. But the issue is this tutorial is still not working for me. Can somebody create a video with this tutorial. or can anybody please help me out with this?
This seems like the form component coming with the tutorial doesn't have an advanced tab and also I am confused to use which text component should be used because it seem there are multiple text components.