feat: optimize.

src/Ursa/Controls/Rating/RatingCharacter.cs

@@ -8,19 +8,11 @@ namespace Ursa.Controls;
 
 [PseudoClasses(PC_Selected)]
 [TemplatePart(PART_IconGlyph, typeof(PathIcon))]
-public class RatingCharacter : ContentControl
+public class RatingCharacter : TemplatedControl
 {
     public const string PART_IconGlyph = "PART_IconGlyph";
     protected const string PC_Selected = ":selected";
 
-    private PathIcon? _icon;
-
-    protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
-    {
-        base.OnApplyTemplate(e);
-        _icon = e.NameScope.Find<PathIcon>(PART_IconGlyph);
-    }
-
     protected override void OnPointerEntered(PointerEventArgs e)
     {
         var parent = this.GetLogicalAncestors().OfType<Rating>().FirstOrDefault();