[AppKit] Fix wrong binding for NSToolbarItem.Image in Mac Catalyst. F…

…ixes #15068.

Fixes #15068.

src/appkit.cs

@@ -20246,7 +20246,24 @@ interface NSToolbarItem : NSCopying, NSMenuItemValidation, NSValidatedUserInterf
 		bool Enabled { [Bind ("isEnabled")]get; set; }
 
 		[Export ("image", ArgumentSemantic.Retain), NullAllowed]
+#if XAMCORE_5_0 && __MACCATALYST__
+		UIImage Image { get; set; }
+#else
 		NSImage Image { get; set; }
+#endif
+
+		// We incorrectly bound 'Image' as NSImage in Mac Catalyst.
+		// Provide this alternative until we can make 'Image' correct in XAMCORE_5_0
+		// Obsolete this member in XAMCORE_5_0
+		// and remove it in XAMCORE_6_0
+#if __MACCATALYST__ && !XAMCORE_6_0
+#if XAMCORE_5_0
+		[Obsolete ("Use 'Image' instead.")]
+#endif
+		[Sealed]
+		[Export ("image", ArgumentSemantic.Retain), NullAllowed]
+		UIImage UIImage { get; set; }
+#endif
 
 		[NoMacCatalyst]
 		[Export ("view", ArgumentSemantic.Retain)]