fixing most whitespace issues, reordering namespaces and adding in headers (#5677)

src/modules/launcher/PowerLauncher/PublicAPIInstance.cs

@@ -1,8 +1,11 @@
-using System;
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
-using System.Threading.Tasks;
 using System.Windows;
 using Wox.Core.Plugin;
 using Wox.Core.Resource;
@@ -60,7 +63,7 @@ namespace Wox
 
         public void CheckForNewUpdate()
         {
-            //_settingsVM.UpdateApp();
+            // _settingsVM.UpdateApp();
         }
 
         public void SaveAppAllSettings()