[add] ability to press back in checkout
[add] ability to press back in checkout

pkarw/vue-storefront,DivanteLtd/vue-storefront,DivanteLtd/vue-storefront,DivanteLtd/vue-storefront,pkarw/vue-storefront,pkarw/vue-storefront,DivanteLtd/vue-storefront,patrykpiston/vue-storefront,pkarw/vue-storefront,patrykpiston/vue-storefront