feat: add avalonia AutoCompleteBox style.

src/Shared/HandyControl_Shared/Controls/Attach/InfoElement.cs

@@ -91,7 +91,8 @@ public class InfoElement : TitleElement
         => (string) element.GetValue(RegexPatternProperty);
 
     public static readonly DependencyProperty ShowClearButtonProperty = DependencyProperty.RegisterAttached(
-        "ShowClearButton", typeof(bool), typeof(InfoElement), new PropertyMetadata(ValueBoxes.FalseBox));
+        "ShowClearButton", typeof(bool), typeof(InfoElement),
+        new FrameworkPropertyMetadata(ValueBoxes.FalseBox, FrameworkPropertyMetadataOptions.Inherits));
 
     public static void SetShowClearButton(DependencyObject element, bool value)
         => element.SetValue(ShowClearButtonProperty, ValueBoxes.BooleanBox(value));