Disable service worker on Cordova and NW.js platforms

www/index.html

@@ -66,6 +66,7 @@
 <script src="assets/js/main.js"></script>
 
 <script>
+    if (platform_type != "cordova" && platform_type != "nw") {
         if ('serviceWorker' in navigator) {
             // Register a service worker hosted at the root of the
             // site using the default scope.
@@ -77,4 +78,5 @@
         } else {
             console.log('Service workers are not supported.');
         }
+    }
 </script>

www/manifest.json

@@ -40,9 +40,6 @@
     ],
     "scope": "/",
     "lang": "en-US",
-    "serviceworker": {
-        "src": "./sw.js"
-    },
     "categories": ["navigation", "productivity", "utilities", "weather"],
     "prefer_related_applications": true,
     "related_applications": [