Merge branch 'material' into 'master'

material theatre scene - load font in Awake

See merge request upm-packages/ui-widgets/com.unity.uiwidgets!167

Samples/UIWidgetsTheatre/UIWidgetsTheatre.cs

                 home: entries[this.testCaseId].entryWidget);
         }
 
-        protected override void OnEnable() {
-            base.OnEnable();
-            FontManager.instance.addFont(Resources.Load<Font>(path: "MaterialIcons-Regular"));
+        protected override void Awake() {
+            base.Awake();
+            FontManager.instance.addFont(Resources.Load<Font>("MaterialIcons-Regular"), "Material Icons");
         }
     }