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

src/modules/launcher/PowerLauncher/LauncherControl.xaml.cs

@@ -1,4 +1,8 @@
-using System.Windows.Controls;
+// 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.Windows.Controls;
 
 namespace PowerLauncher
 {
@@ -12,4 +16,4 @@ namespace PowerLauncher
             InitializeComponent();
         }
     }
-}
+}