Add ACCESS_NETWORK_STATE permission for better WebView support.

app/src/main/AndroidManifest.xml

@@ -9,6 +9,8 @@
 
     <!-- Retrieve online modules -->
     <uses-permission android:name="android.permission.INTERNET" />
+    <!-- WebView offline webpage support -->
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <!-- Make sure of the module active state by checking enabled modules on boot -->
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <!-- Open config apps for applications -->