Update default.ts

show navbar in fullscreen
https://github.com/BabylonJS/Babylon.js/issues/4276

Viewer/src/configuration/types/default.ts

@@ -43,7 +43,7 @@ export let defaultConfiguration: ViewerConfiguration = {
                 logoText: 'BabylonJS',
                 logoLink: 'https://babylonjs.com',
                 hideHelp: true,
-                disableOnFullscreen: true,
+                disableOnFullscreen: false,
             },
             events: {
                 pointerdown: {
@@ -102,4 +102,4 @@ export let defaultConfiguration: ViewerConfiguration = {
     },
     scene: {
     }
-}
+}