Fix a bunch of UI nits in sheriff-o-matic.

Tools/GardeningServer/ui/ct-tree-status-tests.html

 <!--
 Copyright 2014 The Chromium Authors. All rights reserved.
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 -->
 
 <link rel="import" href="ct-tree-status.html">
 
 <script>
 (function () {
@@ skipping 50 matching lines @@
               "Tree is throttled just for fun by username@test.org");
         equal(throttledtree.status, "throttled");
       }),
       closedtree.update().then(function() {
         equal(closedtree.message,
               "Tree is closed for maintenance by username@test.org");
         equal(closedtree.status, "closed");
       })
     ]).then(function() {
       requestAnimationFrame(function() {
-        ok(!opentree.shadowRoot.textContent.trim());
+        ok(!opentree.shadowRoot.textContent.has("open-tree-project"));
         ok(throttledtree.shadowRoot.textContent.has("throttled-tree-project"));
         ok(closedtree.shadowRoot.textContent.has("closed-tree-project"));
         start();
         treestatus.urlByName = urlByName;
       });
     });
   });
 });
 
 })();
 </script>