Also fix underscore rendering in ScrollViewerScrollBarlessTemplate

Co-authored-by: NotYoojun <54567489+NotYoojun@users.noreply.github.com>

Author: Copilot

source/iNKORE.UI.WPF.Modern/Themes/Controls/ScrollViewer.xaml

@@ -239,7 +239,8 @@
             <ScrollContentPresenter
                 x:Name="ScrollContentPresenter"
                 Margin="{TemplateBinding Padding}"
-                ContentTemplate="{TemplateBinding ContentTemplate}" />
+                ContentTemplate="{TemplateBinding ContentTemplate}"
+                RecognizesAccessKey="False" />
         </Grid>
     </ControlTemplate>