scattergl symbols not visible in Edge browser

[bcdunbar]

Markers not visible in Microsoft Edge browser when chart type is scattergl and symbol is set (see image below).

Open in Microsoft Edge browser: https://codepen.io/bcd/pen/bKMrZe
Microsoft Edge 42.17134.1.0

[alexcjohnson]

confirmed, thanks @bcdunbar - cc @dy

[etpinard]

From #2863 (comment), looks like will need a separate fix for Edge.