Enhance the step builder user experience

We have enhanced the step builder user experience. A new circle step builder has been added:

1. This step builder shows a round button for each step
2. Only the tab and the products will show for the corresponding step
3. In other words, there will be 1 tab and a product grid showing for that step

Here's a sample bundle you can try: https://benny-test-store.myshopify.com/products/back-to-winter-ski-bundle

You can activate the option in the BYOB Product Selection -> Show step builder:

Following on, we'll deprecate a step builder if the usage is too low.

This helps reduce bloated code and speed up the page loading time. Feel free to give us feedback. We'd be happy to hear from you!