Merge pull request #3840 from AvaloniaUI/dbus-menu-icon

icon-data support for dbusmenu

src/Avalonia.FreeDesktop/DBusMenuExporter.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Specialized;
+using System.IO;
 using System.Reactive.Disposables;
 using System.Threading.Tasks;
 using Avalonia.Controls;
@@ -184,7 +185,7 @@ namespace Avalonia.FreeDesktop
 
             private static string[] AllProperties = new[]
             {
-                "type", "label", "enabled", "visible", "shortcut", "toggle-type", "children-display", "toggle-state"
+                "type", "label", "enabled", "visible", "shortcut", "toggle-type", "children-display", "toggle-state", "icon-data"
             };
             
             object GetProperty((NativeMenuItemBase item, NativeMenu menu) i, string name)
@@ -248,6 +249,16 @@ namespace Avalonia.FreeDesktop
                             return item.IsChecked ? 1 : 0;
                     }
 
+                    if (name == "icon-data")
+                    {
+                        if (item.Icon != null)
+                        {
+                            var ms = new MemoryStream();
+                            item.Icon.Save(ms);
+                            return ms.ToArray();
+                        }
+                    }
+
                     if (name == "children-display")
                         return menu != null ? "submenu" : null;
                 }