Fixing more warnings (#5189)

* classes need to be in new files

* adding in new lines

Co-authored-by: Clint Rutkas <crutkas@microsoft.com>

src/core/Microsoft.PowerToys.Settings.UI/App.xaml.cs

@@ -2,45 +2,10 @@
 // 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.Runtime.InteropServices;
 using Microsoft.Toolkit.Win32.UI.XamlHost;
 
 namespace Microsoft.PowerToys.Settings.UI
 {
-    [ComImport]
-    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
-    [Guid("45D64A29-A63E-4CB6-B498-5781D298CB4F")]
-    internal interface ICoreWindowInterop
-    {
-        System.IntPtr WindowHandle { get; }
-
-        void MessageHandled(bool value);
-    }
-
-    internal static class Interop
-    {
-        public static ICoreWindowInterop GetInterop(this Windows.UI.Core.CoreWindow @this)
-        {
-            var unkIntPtr = Marshal.GetIUnknownForObject(@this);
-            try
-            {
-                var interopObj = Marshal.GetTypedObjectForIUnknown(unkIntPtr, typeof(ICoreWindowInterop)) as ICoreWindowInterop;
-                return interopObj;
-            }
-            finally
-            {
-                Marshal.Release(unkIntPtr);
-                unkIntPtr = System.IntPtr.Zero;
-            }
-        }
-
-
-        [DllImport("user32.dll")]
-        public static extern bool ShowWindow(System.IntPtr hWnd, int nCmdShow);
-
-        public const int SW_HIDE = 0;
-    }
-
     public sealed partial class App : XamlApplication
     {
         public App()

src/core/Microsoft.PowerToys.Settings.UI/Controls/GroupTitleTextBlock.xaml.cs

@@ -19,7 +19,6 @@ using Windows.UI.Xaml.Media;
 using Windows.UI.Xaml.Navigation;
 
 // The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
-
 namespace Microsoft.PowerToys.Settings.UI.Controls
 {
     public sealed partial class GroupTitleTextBlock : UserControl

src/core/Microsoft.PowerToys.Settings.UI/ICoreWindowInterop.cs

@@ -0,0 +1,18 @@
+// 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.Runtime.InteropServices;
+
+namespace Microsoft.PowerToys.Settings.UI
+{
+    [ComImport]
+    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+    [Guid("45D64A29-A63E-4CB6-B498-5781D298CB4F")]
+    internal interface ICoreWindowInterop
+    {
+        System.IntPtr WindowHandle { get; }
+
+        void MessageHandled(bool value);
+    }
+}

src/core/Microsoft.PowerToys.Settings.UI/Interop.cs

@@ -0,0 +1,31 @@
+// 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.Runtime.InteropServices;
+
+namespace Microsoft.PowerToys.Settings.UI
+{
+    internal static class Interop
+    {
+        public static ICoreWindowInterop GetInterop(this Windows.UI.Core.CoreWindow @this)
+        {
+            var unkIntPtr = Marshal.GetIUnknownForObject(@this);
+            try
+            {
+                var interopObj = Marshal.GetTypedObjectForIUnknown(unkIntPtr, typeof(ICoreWindowInterop)) as ICoreWindowInterop;
+                return interopObj;
+            }
+            finally
+            {
+                Marshal.Release(unkIntPtr);
+                unkIntPtr = System.IntPtr.Zero;
+            }
+        }
+
+        [DllImport("user32.dll")]
+        public static extern bool ShowWindow(System.IntPtr hWnd, int nCmdShow);
+
+        public const int SW_HIDE = 0;
+    }
+}

src/core/Microsoft.PowerToys.Settings.UI/Microsoft.PowerToys.Settings.UI.csproj

@@ -109,6 +109,8 @@
     <Compile Include="Helpers\Observable.cs" />
     <Compile Include="Helpers\RelayCommand.cs" />
     <Compile Include="Helpers\ResourceExtensions.cs" />
+    <Compile Include="ICoreWindowInterop.cs" />
+    <Compile Include="Interop.cs" />
     <Compile Include="Services\ActivationService.cs" />
     <Compile Include="Services\NavigationService.cs" />
     <Compile Include="ViewModels\ColorPickerViewModel.cs" />

src/core/Microsoft.PowerToys.Settings.UI/ViewModels/PowerRenameViewModel.cs

@@ -109,7 +109,6 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
             }
         }
 
-
         public bool EnabledOnContextMenu
         {
             get