fix some bugs reported by sonarCloud

src/components/multiSelect/multiSelect.js

@@ -249,11 +249,9 @@ import confirm from '../confirm/confirm';
                                 dispatchNeedsRefresh();
                                 break;
                             case 'playlist':
-                                import('../playlisteditor/playlisteditor').then((playlistEditor) => {
-                                    new playlistEditor({
-                                        items: items,
-                                        serverId: serverId
-                                    });
+                                new playlistEditor({
+                                    items: items,
+                                    serverId: serverId
                                 });
                                 hideSelections();
                                 dispatchNeedsRefresh();

src/components/playback/playbackmanager.js

@@ -3126,7 +3126,7 @@ class PlaybackManager {
             }
         });
 
-        pluginManager.ofType('mediaplayer').map(initMediaPlayer);
+        pluginManager.ofType('mediaplayer').forEach(initMediaPlayer);
 
         function sendProgressUpdate(player, progressEventName, reportPlaylist) {
             if (!player) {

src/components/playback/playersettingsmenu.js

@@ -33,18 +33,18 @@ function showQualityMenu(player, btn) {
         return opt;
     });
 
-    let selectedId = options.filter(function (o) {
+    const selectedId = options.filter(function (o) {
         return o.selected;
     });
 
-    selectedId = selectedId.length ? selectedId[0].bitrate : null;
+    const selectedBitrate = selectedId.length ? selectedId[0].bitrate : null;
 
     return actionsheet.show({
         items: menuItems,
         positionTo: btn
     }).then(function (id) {
         const bitrate = parseInt(id);
-        if (bitrate !== selectedId) {
+        if (bitrate !== selectedBitrate) {
             playbackManager.setMaxStreamingBitrate({
                 enableAutomaticBitrateDetection: bitrate ? false : true,
                 maxBitrate: bitrate