Not sure if this is a bug or just something quirk that no one noticed.
When you have an input field in an apps settings page (not sure about devices) all input fields that have a dropdown will display "click to set" until you select something, once you have selected an option in the dropdown, if you open the dropdown again, you now have a "no selection" option a the top.
This works exactly as it should BUT if you have a required input, you still have a "no selection" option that can be selected once an initial selection has been made. Shouldn't that "no selection" not be available when the field is required?
BTW, you do get the required warning when clicking "done" of course.
EDIT: Same behavior with devices.
