Fix add-environment for new prefixed autocomplete input.
Fix add-environment for new prefixed autocomplete input.

mozilla/moztrap,mozilla/moztrap,mozilla/moztrap,shinglyu/moztrap,mozilla/moztrap,bobsilverberg/moztrap,bobsilverberg/moztrap,mozilla/moztrap,mccarrmb/moztrap,shinglyu/moztrap,shinglyu/moztrap,mccarrmb/moztrap,shinglyu/moztrap,shinglyu/moztrap,mccarrmb/moztrap,bobsilverberg/moztrap,bobsilverberg/moztrap,mccarrmb/moztrap,mccarrmb/moztrap