Resolve "Normalize Activity application architecture"

Closes #89 (closed)

assets/translations/en.json

 {
   "app_name": "Sandbox App",
 
-  "bottom_nav_sample": "Sample",
-  "bottom_nav_camera": "Camera",
-  "bottom_nav_api": "API",
-  "bottom_nav_chart": "Graph",
-  "bottom_nav_game": "Game",
-  "bottom_nav_settings": "Settings",
-  "bottom_nav_about": "About",
+  "page_home": "Home",
+  "page_demo": "Demo",
+  "page_camera": "Camera",
+  "page_api": "API",
+  "page_graph": "Graph",
+  "page_game": "Game",
+
+  "screen_settings": "Settings",
+  "screen_about": "About",
 
   "api_page_title": "API",