fix: ProtectedCursor is now supported in Uno Platform (#433)

* fix: ProtectedCursor is now supported in Uno Platform

* Update components/Sizers/src/SizerBase.Properties.cs

* Update components/Sizers/src/SizerBase.cs

---------

Co-authored-by: Arlo <arlo.godfrey@outlook.com>

Author: MartinZikmund

components/Sizers/src/SizerBase.Properties.cs

@@ -132,9 +132,7 @@ private static void OnOrientationPropertyChanged(DependencyObject d, DependencyP
             return;
 #endif
 
-            // TODO: [UNO] Only supported on certain platforms
-            // See ProtectedCursor here: https://github.com/unoplatform/uno/blob/3fe3862b270b99dbec4d830b547942af61b1a1d9/src/Uno.UI/UI/Xaml/UIElement.cs#L1015-L1023
-#if WINAPPSDK && !HAS_UNO
+#if WINUI3
             // Need to wait until we're at least applying template step of loading before setting Cursor
             // See https://github.com/microsoft/microsoft-ui-xaml/issues/7062
             if (gripper._appliedTemplate &&

components/Sizers/src/SizerBase.cs

@@ -100,8 +100,7 @@ protected override AutomationPeer OnCreateAutomationPeer()
         return new SizerAutomationPeer(this);
     }
 
-// On Uno the ProtectedCursor isn't supported yet, so we don't need this value.
-#if WINAPPSDK && !HAS_UNO
+#if WINUI3
     // Used to track when we're in the OnApplyTemplateStep to change ProtectedCursor value.
     private bool _appliedTemplate = false;
 #endif
@@ -133,7 +132,7 @@ protected override void OnApplyTemplate()
 
         // Trigger initial state transition based on if we're Enabled or not currently.
         SizerBase_IsEnabledChanged(this, null!);
-#if WINAPPSDK && !HAS_UNO
+#if WINUI3
         // On WinAppSDK, we'll trigger this to setup the initial ProtectedCursor value.
         _appliedTemplate = true;
 #endif