Minor Observatory UI tweaks.

runtime/observatory/lib/src/elements/isolate_view.html

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="action_link.html">
 <link rel="import" href="curly_block.html">
 <link rel="import" href="eval_box.html">
 <link rel="import" href="function_ref.html">
 <link rel="import" href="isolate_summary.html">
 <link rel="import" href="library_ref.html">
 <link rel="import" href="nav_bar.html">
 <link rel="import" href="observatory_element.html">
 <link rel="import" href="script_inset.html">
@@ skipping 122 matching lines @@
 
     <div class="content">
       <div id="tagProfileChart" class="miniProfileChart" style="height: 600px"></div>
     </div>
 
     <hr>
 
     <div class="content">
       <eval-box callback="{{ evaluate }}"></eval-box>
     </div>
+
+    <div class="content-centered-big">
+      <hr>
+      <script-inset script="{{ rootLibrary.rootScript }}">
+      </script-inset>
+    </div>
+
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="isolate_view.dart"></script>