Rename Win32SpecificOptions to Win32Properties (#14662)

* Rename Win32SpecificOptions to Win32Properties

* Update win32 project as well

* Add missing doc

src/Avalonia.Controls/Platform/IWin32OptionsTopLevelImpl.cs

@@ -5,7 +5,7 @@ using System.Text;
 using System.Threading.Tasks;
 using Avalonia.Metadata;
 using Avalonia.Platform;
-using static Avalonia.Controls.Platform.Win32SpecificOptions;
+using static Avalonia.Controls.Win32Properties;
 
 namespace Avalonia.Controls.Platform
 {

src/Avalonia.Controls/Platform/Win32SpecificOptions.cs → src/Avalonia.Controls/Platform/Win32Properties.cs

@@ -4,13 +4,17 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using Avalonia.Controls;
+using Avalonia.Controls.Platform;
 using Avalonia.Metadata;
 using Avalonia.Platform;
 using static Avalonia.Controls.Platform.IWin32OptionsTopLevelImpl;
 
-namespace Avalonia.Controls.Platform
+namespace Avalonia.Controls
 {
-    public static class Win32SpecificOptions
+    /// <summary>
+    /// Set of Win32 specific properties and events that allow deeper customization of the application per platform.
+    /// </summary>
+    public static class Win32Properties
     {
         public delegate (uint style, uint exStyle) CustomWindowStylesCallback(uint style, uint exStyle);
         public delegate IntPtr CustomWndProcHookCallback(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam, ref bool handled);

src/Windows/Avalonia.Win32/WindowImpl.cs

@@ -27,7 +27,7 @@ using System.Diagnostics;
 using Avalonia.Platform.Storage.FileIO;
 using Avalonia.Threading;
 using static Avalonia.Controls.Platform.IWin32OptionsTopLevelImpl;
-using static Avalonia.Controls.Platform.Win32SpecificOptions;
+using static Avalonia.Controls.Win32Properties;
 
 namespace Avalonia.Win32
 {