for the sake of bookmarking: Add a manual copy of the TabView style

this is a copy of the TabView style as of today's main,
  93e23c225c/dev/TabView/TabView.xaml

  I'm gonna change this to see if we can fix this

src/cascadia/TerminalApp/TabRowControl.xaml

@@ -14,6 +14,15 @@
 
     <!--  GH#13143: Make sure that the Background is actually TabViewBackground here, not Transparent. This is load bearing, for showTabsInTitlebar=false.  -->
 
+
+    <ContentPresenter.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="TabViewStyles.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </ContentPresenter.Resources>
+
     <mux:TabView x:Name="TabView"
                  VerticalAlignment="Bottom"
                  HorizontalContentAlignment="Stretch"
@@ -22,6 +31,7 @@
                  CanDragTabs="True"
                  CanReorderTabs="True"
                  IsAddTabButtonVisible="false"
+                 Style="{StaticResource MyTabViewStyle}"
                  TabWidthMode="Equal">
 
         <mux:TabView.TabStripHeader>

src/cascadia/TerminalApp/TerminalAppLib.vcxproj

@@ -60,6 +60,9 @@
     <Page Include="CommandPalette.xaml">
       <SubType>Designer</SubType>
     </Page>
+    <Page Include="TabViewStyles.xaml">
+      <SubType>Designer</SubType>
+    </Page>
   </ItemGroup>
   <!-- ========================= Headers ======================== -->
   <ItemGroup>