Docs: Add multi-window support doc to display section for the N release
      Minor cleanup on Do-not-distrub to fix broken page title

Bug: 27621451
Change-Id: I79b374e1e4ebbab7f7e3af2d560ce37acff78796
diff --git a/src/devices/devices_toc.cs b/src/devices/devices_toc.cs
index 6c95564..6aa6188 100644
--- a/src/devices/devices_toc.cs
+++ b/src/devices/devices_toc.cs
@@ -391,6 +391,7 @@
         </div>
         <ul>
           <li><a href="<?cs var:toroot ?>devices/tech/display/dnd.html">Do Not Disturb</a></li>
+          <li><a href="<?cs var:toroot ?>devices/tech/display/multi-window.html">Multi-Window</a></li>
         </ul>
       </li>