port web settings to es6

package.json

@@ -82,7 +82,8 @@
           "src/components/filedownloader.js",
           "src/components/filesystem.js",
           "src/components/input/keyboardnavigation.js",
-          "src/components/sanatizefilename.js"
+          "src/components/sanatizefilename.js",
+          "src/scripts/settings/webSettings.js"
         ],
         "plugins": [
           "@babel/plugin-transform-modules-amd"

src/components/apphost.js

@@ -278,9 +278,9 @@ define(["appSettings", "browser", "events", "htmlMediaHelper", "webSettings"], f
         features.push("targetblank");
         features.push("screensaver");
 
-        if (webSettings.enableMultiServer()) {
+        webSettings.enableMultiServer().then(enabled => {
-            features.push("multiserver")
+            if (enabled) features.push("multiserver")
-        }
+        })
 
         if (!browser.orsay && !browser.msie && (browser.firefox || browser.ps4 || browser.edge || supportsCue())) {
             features.push("subtitleappearancesettings");

src/scripts/settings/webSettings.js

@@ -1,27 +1,11 @@
-define(['appStorage', 'events'], function (appStorage, events) {
-    'use strict';
-
-    var data;
-
 function getConfig() {
-        if (data) {
+    return fetch("/config.json?nocache=" + new Date().getUTCMilliseconds()).then(function (response) {
-            return data;
+        return response.json();
-        }
-
-        fetch("/config.json").then(function (response) {
-            data = response.json();
-        })
-
-        return data;
-    }
-
-    function WebSettings() {
-        getConfig();
-    }
-
-    WebSettings.prototype.enableMultiServer = function () {
-        return getConfig().multiServer || false;
-    };
-
-    return new WebSettings();
     });
+}
+
+export function enableMultiServer() {
+    return getConfig().then(config => {
+        return config.multiserver;
+    });
+}