Method constructor

docs/app/js/sanddance-app.js:355–363

(props)

function _PositionedColumnMap(props1) {
    class __PositionedColumnMap extends (0, _base.base).react.Component {
        constructor(props){
            super(props);
            const { left , top  } = props;
            this.state = {
                left,
                top
            };
            this.dropdownRef = (0, _base.base).react.createRef();
        }
        focus() {
            if (!this.focused) {
                this.focused = true;