Observatory: Tweak disassembly comments

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

 <link rel="import" href="../../../../packages/polymer/polymer.html">
 <link rel="import" href="function_ref.html">
 <link rel="import" href="instance_ref.html">
 <link rel="import" href="observatory_element.html">
 <link rel="import" href="nav_bar.html">
 <link rel="import" href="script_ref.html">
 <link rel="import" href="view_footer.html">
 
 <polymer-element name="code-view" extends="observatory-element">
   <template>
@@ skipping 16 matching lines @@
       th:nth-of-type(3), td:nth-of-type(3) {
         min-width: 8em;
         text-align: left;
       }
 
       th:nth-of-type(4), td:nth-of-type(4) {
         text-align: left;
         overflow: visible;
         white-space: pre;
         padding-right: 1em;
+        width: 1px;
       }
 
       th:nth-of-type(5), td:nth-of-type(5) {
         text-align: left;
         overflow: visible;
       }
 
       tr:hover > td {
         background-color: #F4C7C3;
       }
 
+      .code-comment {
+        color: grey;
+        font-style: italic;
+      }
+
     </style>
     <nav-bar>
       <top-nav-menu></top-nav-menu>
       <vm-nav-menu vm="{{ code.isolate.vm }}"></vm-nav-menu>
       <isolate-nav-menu isolate="{{ code.isolate }}"></isolate-nav-menu>
       <nav-menu link="{{ makeLink('/inspect', code) }}" anchor="{{ code.name }}" last="{{ true }}"></nav-menu>
       <nav-refresh callback="{{ refresh }}"></nav-refresh>
       <nav-refresh callback="{{ refreshTicks }}" label="Refresh Ticks"></nav-refresh>
     </nav-bar>
     <div class="content">
@@ skipping 86 matching lines @@
         </thead>
         <tbody class="monospace" id="disassemblyTableBody">
         </tbody>
       </table>
     </div>
     <view-footer></view-footer>
   </template>
 </polymer-element>
 
 <script type="application/dart" src="code_view.dart"></script>