chore: added scenery offline icon in active train schedule; icon improvements

src/locales/en.json

@@ -50,7 +50,7 @@
     "migration-confirm": "Roger that!",
     "offline": "App is in the offline mode!",
     "tooltip-driver-offline": "Driver is offline",
-    "tooltip-scenery-offline": "Offline ride through the scenery"
+    "tooltip-scenery-offline": "Scenery is offline"
   },
   "footer": {
     "discord": "Stacjownik Discord server"

src/locales/pl.json

@@ -47,7 +47,7 @@
     "no-result": "Brak wyników o podanych kryteriach!",
     "offline": "Aplikacja w trybie offline!",
     "tooltip-driver-offline": "Maszynista offline",
-    "tooltip-scenery-offline": "Jazda offline przez scenerię"
+    "tooltip-scenery-offline": "Sceneria offline"
   },
   "footer": {
     "discord": "Serwer Discord Stacjownika"