Graph Fonts: Add 'Material Icons Round-Regular' (APL-2 license) and use it in UISceneDemo03 via hard coded unicode symbol numbers.
These fonts has been fetched from
File has been extracted from font/MaterialIconsRound-Regular.otf
Licensed under: Apache License Version 2.0, January 2004
Date: Mon Sep 19 15:53:40 2022 -0700
Update icons 9/19
The Apache License, Version 2.0 (the "License")
can be obtained at <http://www.apache.org/licenses/LICENSE-2.0>.