docs: add back shouldShowAd computed property
docs: add back shouldShowAd computed property

was showing ad on store/home page

vuetifyjs/vuetify,Phlow2001/vuetify,vuetifyjs/vuetify,Phlow2001/vuetify,vuetifyjs/vuetify,Webifi/vuetify,Phlow2001/vuetify,Webifi/vuetify,Phlow2001/vuetify,vuetifyjs/vuetify,Webifi/vuetify