Method redo

docs/app/js/sanddance-app.js:14253–14260

(historyIndex = this.state.historyIndex + 1)

            }));
        }
        redo(historyIndex = this.state.historyIndex + 1) {
            if (historyIndex >= this.state.historyItems.length) return;
            const newState = this.replay(historyIndex);
            this.rebaseFilter = true;
            this.setState(Object.assign(Object.assign({}, newState), {
                historyIndex
            }));
        }
        changespecCapabilities(specCapabilities) {
            this.setState({
                specCapabilities