Method updateConfiguration

docs/app/js/sanddance-app.js:58426–58433

(configuration)

        return this.updateConfiguration(configuration);
    }
    updateConfiguration(configuration) {
        Object.assign(this.config, configuration);
        if (this.storage) {
            const serialized = JSON.stringify(this.config);
            this.storage.setItem(this.id, serialized);
        }
        return this;
    }
    _loadConfiguration() {
        let configuration = {};
        if (this.storage) {