Devtools: Add new row in toolbarButtonGlyphs and layout editor icon

Source/devtools/front_end/sources/sourcesSearch.css

 /*
  * Copyright 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.
  */
 
 .search-drawer-header {
     flex: none;
     padding: 4px;
     display: flex;
@@ skipping 55 matching lines @@
     display: none;
 }
 
 #search-results-pane-file-based ol.children.expanded {
     display: block;
 }
 
 #search-results-pane-file-based li.parent::before {
     -webkit-user-select: none;
     background-image: url(Images/toolbarButtonGlyphs.png);
-    background-size: 352px 144px;
+    background-size: 352px 168px;
     opacity: 0.5;
     width: 12px;
     content: "a";
     color: transparent;
     margin-left: -5px;
     padding-right: 4px;
     display: inline-block;
     box-sizing: border-box;
 }
 
@@ skipping 94 matching lines @@
 
 .empty-view {
     font-size: 24px;
     color: rgb(75%, 75%, 75%);
     font-weight: bold;
     padding: 10px;
     display: flex;
     align-items: center;
     justify-content: center;
 }