Fixes admin root redirect when Spree is mounted in a custom mountpoint
Fixes admin root redirect when Spree is mounted in a custom mountpoint

Fixes https://github.com/spree/spree/issues/7722

ayb/spree,vinayvinsol/spree,vinayvinsol/spree,vinayvinsol/spree,ayb/spree,vinayvinsol/spree,vinsol/spree,imella/spree,vinsol/spree,imella/spree,imella/spree,vinsol/spree,ayb/spree,vinsol/spree,ayb/spree