Method activate

docs/app/js/sanddance-app.js:10043–10049

(datum)

        });
    }
    activate(datum) {
        return new Promise((resolve, reject)=>{
            this.dataScope.activate(datum);
            this.props.onDataChanged(DataLayoutChange.same);
            resolve();
        });
    }
    deactivate() {
        return new Promise((resolve, reject)=>{
            this.dataScope.deactivate();