I've add your components as a sample npm package in our designer:
https://node-projects.github.io/web-component-designer-demo/index.html
I've found two things when I tested:
Your manifest does not return "number" as the property type for the "selected" property of generic-radio
And setting the selected propety of generic radio does not check the element
I've add your components as a sample npm package in our designer:
https://node-projects.github.io/web-component-designer-demo/index.html
I've found two things when I tested:
Your manifest does not return "number" as the property type for the "selected" property of generic-radio
And setting the selected propety of generic radio does not check the element