feat(ui): render the ORBIT indicator from the location tray

LocationControls offers the indicator with showOrbit(active) in its
presented tray instead of building it on the body, and the scene chrome
teleports it there. Orbit toggles, including the voice switch, light it
through the controls.

src/ui/shellFacade.js

@@ -249,14 +249,6 @@ export class ShellFacade {
     this._locationNavigation.orbitController = value;
   }
 
-  get _orbitIndicator() {
-    return this._locationNavigation._orbitIndicator;
-  }
-
-  set _orbitIndicator(value) {
-    this._locationNavigation._orbitIndicator = value;
-  }
-
   get cockpitView() {
     return this._cockpitCoordinator?.cockpitView;
   }