fixes for lint errors

added missing packages for lint
removed unecessary babel/polyfill

src/scripts/globalize.js

@@ -163,7 +163,7 @@ import { Events } from 'jellyfin-apiclient';
                 return;
             }
 
-            let url = filtered[0].path;
+            const url = filtered[0].path;
 
             import(`../strings/${url}`).then((fileContent) => {
                 resolve(fileContent);

src/scripts/site.js

@@ -73,7 +73,7 @@ window.pageIdOn = function(eventName, id, fn) {
     });
 };
 
-if (self.appMode === 'cordova' || self.appMode === 'android' || self.appMode === 'standalone') {
+if (window.appMode === 'cordova' || window.appMode === 'android' || window.appMode === 'standalone') {
     AppInfo.isNativeApp = true;
 }
 

src/scripts/themeManager.js

@@ -17,7 +17,7 @@ function getThemes() {
 
 function getThemeStylesheetInfo(id) {
     return getThemes().then(themes => {
-        const theme = themes.find(theme => {
+        let theme = themes.find(theme => {
             return id ? theme.id === id : theme.default;
         });