“Submit your application” page misuses switches

1. Go to <https://myapps.developer.ubuntu.com/>.
2. Advance to the “Submit your application to the Ubuntu store” page.
3. Look at the “Series” controls.

What you see:
* The controls are switches.
* Toggling one of the switches toggles the other one.

This is inconsistent with how switches behave on Ubuntu and every other OS. And it won’t work if/when there are ever more than two series: if you turn the currently-on switch off, either none will turn on (leaving you in an unsubmittable state), or an arbitrary one will turn on which users won’t be able to predict.

What you should see:
* The controls are radio buttons.