Devtools: Add new row in toolbarButtonGlyphs and layout editor icon

Source/devtools/front_end/network/xmlView.css

 /*
  * Copyright (c) 2014 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.
  */
 
 .shadow-xml-view {
     -webkit-user-select: text;
     overflow: auto;
     padding: 2px 4px;
@@ skipping 15 matching lines @@
 }
 
 .shadow-xml-view li {
   display: flex;
   align-items: center;
 }
 
 .shadow-xml-view li.parent::before {
   -webkit-user-select: none;
   -webkit-mask-image: url(Images/toolbarButtonGlyphs.png);
-  -webkit-mask-size: 352px 144px;
+  -webkit-mask-size: 352px 168px;
   -webkit-mask-position: -4px -97px;
   background-color: rgb(110, 110, 110);
   content: "";
   width: 10px; /* arrow width */
   height: 10px;
 }
 
 .shadow-xml-view li.parent.expanded::before {
   -webkit-mask-position: -20px -97px;
 }
@@ skipping 33 matching lines @@
 }
 
 .shadow-xml-view-text {
     color: rgb(0, 0, 0);
     white-space: pre;
 }
 
 .shadow-xml-view-cdata {
     color: rgb(0, 0, 0);
 }