Selection in `gl2d_scatter-color-clustering.json` mock does not work. `trace.selected` does not get populated [here](https://github.com/plotly/plotly.js/blob/master/src/traces/scattergl/convert.js#L42).
Selection in
gl2d_scatter-color-clustering.jsonmock does not work.trace.selecteddoes not get populated here.