Improves home page loading behavior.

server/www/index.html

@@ -270,6 +270,7 @@ <h1>CB2: a Collaborative Natural Language Instruction Game</h1>
         <a href="/play?lobby_name=google-leader-lobby"><b>Play With a Baseline Bot &rarr;</b></a>
         <p>You may have to wait a bit to play with the bot due to limited compute capacity. We recommend coordinating with a friend to play with another human, because low traffic periods are likely to entail very long waits for a partner.</p>
     </header>
+    <script type="text/javascript"> resize_banner(); </script>
     <main style="margin-top: 0; padding-top: 24px;">
         <section>
             <aside>