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

Tools/GardeningServer/styles/onebar.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 61 matching lines @@
     vertical-align: top;
 }
 
 #link-handling {
     position: absolute;
     top: 10px;
     right: 0;
     padding-right: 4px;
 }
 
+/* This checkbox just overlaps the main content on smalls screens and doesn't
+make a lot of sense as currently designed.*/
+@media only screen and (max-width: 400px) {
+    #link-handling { display: none; }
+}
+
 #new-window-for-links {
     vertical-align: text-bottom;
 }
 
 #onebar details {
     padding-left: 2px;
     padding-right: 2px;
     display: inline-block;
     vertical-align: top;
 }
@@ skipping 19 matching lines @@
 .topbar {
     display: flex;
     align-items: center;
 }
 
 .treestatus {
     display: inline-block;
     margin: 4px;
     font-size: 11px;
 }