Polish UX of chrome://settings/display

chrome/browser/resources/options/chromeos/display_options.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 #display-options-page {
   background-color: rgb(240, 240, 240);
 }
 
 #display-options-content-area {
   padding: 0;
@@ skipping 59 matching lines @@
 }
 
 #display-launcher {
   background-color: lightgrey;
   bottom: 0;
   height: 10px;
   position: absolute;
 }
 
 .displays-display {
+  -webkit-user-select: none;
   background: rgb(240, 240, 240);
   border: solid 1px;
   font-weight: bold;
   position: absolute;
   text-align: center;
   z-index: 2;
 }
 
 .display-mirrored {
-  border: dashed 1px;
+  border: solid 1px;
 }
 
 .displays-focused {
   border: solid 2px rgb(0, 138, 255);
   color: rgb(0, 138, 255);
 }
 
 .display-options-single-button-container {
-  margin: 5px 0 5px 0;
+  padding: 5px 0;
 }
 
 .display-options-button {
   width: 120px;
 }
 
 #display-overscan-calibration-arrow-container {
   background: transparent;
   border: none;
   position: absolute;
@@ skipping 17 matching lines @@
   border-right-color: rgb(64, 64, 64);
 }
 
 .display-overscan-arrow-to-bottom {
   border-top-color: rgb(64, 64, 64);
 }
 
 .display-overscan-arrow-to-right {
   border-left-color: rgb(64, 64, 64);
 }