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

src/modules/launcher/PowerLauncher/Helper/ResultCollection.cs

@@ -1,6 +1,10 @@
-using PowerLauncher.ViewModel;
+// 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.Collections.Generic;
 using System.Collections.Specialized;
+using PowerLauncher.ViewModel;
 
 namespace PowerLauncher.Helper
 {
@@ -42,4 +46,4 @@ namespace PowerLauncher.Helper
         }
 
     }
-}
+}