Steps to reproduce the issue

1. Login to the backend of Joomla
2. Add a new Menu Item with the Menu Item Type Wrapper -> Iframe
3. Give it any Title - doesn't matter
4. Click the Advanced tab
5. Change the Auto Add field from Yes to No
6. Click the Details tab
7. Enter a URL without http or https into the URL field (doesn't matter what it is, let's say google.com)
8. Click Save
9. The URL now has http:// added even though the parameter has been set to "No" for Auto Add

Expected result

That no http or https is added to the URL field when the Auto Add field is set to no.

Actual result

http is added when it shouldn't be

System information (as much as possible)

J 4.1.2
PHP 8.1

Additional comments