title: How do I control the display order of traces in plotly.js?
body: <p>I have a large number of trace lines being displayed.  50-200 typically.  I am comparing historical data to simulated data.  I want to highlight a single simulated traceline by selection via a different color.  All of this works fine.</p>
  
  <p>However, the trace line being shown is sometimes hidden by the large number of other lines.  Is there a way to force the specified trace to be drawn on top of the others, aside from redrawing the entire plot and adding that line last?  Some sort of z-index equivalent or "bring to front" mechanism?</p>