Support rounded LabelGraphics background

[OmarShehata]

I couldn't find an issue open for this. Requested by Josh A on the forum:

https://groups.google.com/d/msg/cesium-dev/olm7gaHyU6w/G6LMyC3_FQAJ

A small, non critical feature request - It would be great to see label backgrounds support a radius!

I think this would be in the same way you can specify a CSS radius to a border to make the edges rounded.

[Sagie501]

Is there an update about this issue? I have found this to be useful in many cases

[brunokunace]

It's a very old feature request, have any updates about it?

[ilanah]

Really need this