Code Quality: Fixed tab navigation in ThemedIcon control (#15936)

Author: mdtauk

src/Files.App.Controls/ThemedIcon/ThemedIcon.xaml

@@ -6,6 +6,8 @@
 
 	<Style x:Key="DefaultThemedIconStyle" TargetType="local:ThemedIcon">
 
+		<Setter Property="IsTabStop" Value="False" />
+
 		<Setter Property="IconSize" Value="16" />
 
 		<Setter Property="OutlineIconData" Value="M8 2C4.68629 2 2 4.68629 2 8C2 11.3137 4.68629 14 8 14C11.3137 14 14 11.3137 14 8C14 4.68629 11.3137 2 8 2ZM1 8C1 4.13401 4.13401 1 8 1C11.866 1 15 4.13401 15 8C15 11.866 11.866 15 8 15C4.13401 15 1 11.866 1 8Z" />

src/Files.App.Controls/ThemedIcon/ThemedIconLayer/ThemedIconLayer.xaml

@@ -6,6 +6,7 @@
 
 	<Style x:Key="DefaultThemedIconLayerStyle" TargetType="local:ThemedIconLayer">
 		<Setter Property="Foreground" Value="{ThemeResource ThemedIconAccentContrastBrush}" />
+		<Setter Property="IsTabStop" Value="False" />
 		<Setter Property="Template">
 			<Setter.Value>
 				<ControlTemplate TargetType="local:ThemedIconLayer">