add reactive helper to inform about online state
add reactive helper to inform about online state

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