Add default backdrop and icon dropdown selection to a custom widget


I have a custom widget (very simple one) for Habpanel but I would like to add the default drop down and icon dropdown buttons and check buttons (like center dropdown or icon size) to my custom widget.

Any description on how to do this. I looked at the source code of the stad widgets but they have multiple files not just the.js.

Attached the widget I would like to refine to contain dropdown.Blindstest-noBD.widget.json (1.6 KB)