Update property name to match parent
Update property name to match parent

This resolves an issue introduced in my last pull request to add a property for active tab.
wffranco/vue-strap,BiodataMiningGroup/vue-strap,yuche/vue-strap,lotestudio/vue-strap,wffranco/vue-strap,tonypee/vue-strap,lotestudio/vue-strap,tonypee/vue-strap,yuche/vue-strap,BiodataMiningGroup/vue-strap