Option to hide x-z lines in SurfaceChart

[ThomasDaheim]

Hi,

first of all thanks for the great library!

I'm currently trying to switch from jzy3d because of better support for zoom & export in orson-charts. While converting my code I have run into something I wasn't able to achieve: I would want to hide the x-y grid lines that are drawn on the surface chart. (Probably something simple to fix but I can't seem to find the option...).

Will attach an image to cleare show what I mean - once I don't get any error when trying to add an attachment.

Thanks for any hints,
Thomas