Promoted CustomSelect from konto/bestellungen/components/ to a shared
app/components/ location. New includeAllOption (checkout doesn't want
a "clear" pseudo-option — a country is always genuinely selected) and
fullWidth (matches the other w-full form fields, no sm: shrink) props.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Marco