Make Garden-o-matic at least readable on mobile devices

Tools/GardeningServer/styles/failures.css

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
 a.failing-builder {
     display: inline-block;
     border: 1px solid Gray;
     margin: 0 0 2px 0;
     padding: 1px;
     color: Black;
     font-size: 11px;
     text-decoration: none;
 }
 
-    a.failing-builder>span.version {
+    a.failing-builder > span.version {
         text-transform: uppercase;
         background-color: #555;
         color: White;
         padding: 0 2px;
     }
 
-    a.failing-builder>span.architecture {
+    a.failing-builder > span.architecture {
         padding: 0 2px;
     }
 
-    .effects a.failing-builder>span.architecture {
+    .effects a.failing-builder > span.architecture {
         background-color: #555;
         color: White;
     }
 
-    a.failing-builder>span.graphics {
+    a.failing-builder > span.graphics {
         padding: 0 2px;
     }
 
 
 ul.failures {
     padding: 0px;
 }
 
-    ul.failures>li {
+    ul.failures > li {
         display: -webkit-box;
         position: relative;
     }
 
-    ul.failures>li label {
+    ul.failures > li label {
         margin-left: 10px;
     }
 
-        ul.failures>li ul.actions {
+        ul.failures > li ul.actions {
             padding: 0px;
             visibility: hidden;
         }
 
-        ul.failures>li:hover ul.actions {
+/* FIXME: This hover effect can't work on mobile. */
+        ul.failures > li:hover ul.actions {
             visibility: visible;
         }