Milo: Print raw json for buildbot build properties

milo/appengine/frontend/static/buildbot/css/default.css

 /* Copyright 2015 The LUCI Authors. All rights reserved.
  * Use of this source code is governed under the Apache License, Version 2.0
  * that can be found in the LICENSE file.
  */
 
 body.interface {
   margin-left: 30px;
   margin-right: 30px;
   margin-top: 20px;
   margin-bottom: 50px;
@@ skipping 570 matching lines @@
 table.info td {
   padding: 0.1em 1em 0.1em 1em;
   text-align: center;
 }
 
 table.info th {
   padding: 0.2em 1.5em 0.2em 1.5em;
   text-align: center;
 }
 
-table.info td.left {
+table.info .left {
   text-align: left
 }
 
 table.info td .reason {
   display:block;
   font-weight: bold;
 }
 
 .alt {
   background-color: #f6f6f6;
@@ skipping 96 matching lines @@
   display: inline;
 }
 
 div.step-text:first-child {
     display: inline;
 }
 
 .hide .verbosity-Hidden {
   display: none;
 }