How do I create product and product display once, like in Commerce Kickstart? In Kickstart you just go Add Product and it creates both, the Product for admin area product list and the Product Display. How do I do that in regular Drupal install with regular Commerce module? Because now I have to go each time to create the actual product for admin product list and then go create a product display for users. Isn't that a bit annoying?

I cannot use Kickstart, it's too late already and it's too big and overcrowded with too much of not needed features.
This is through the contributed module Inline Entity Form.