Devtools: Add new row in toolbarButtonGlyphs and layout editor icon

Source/devtools/front_end/resources/resourcesPanel.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * 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.
@@ skipping 136 matching lines @@
     position: absolute;
     display: block;
     content: "";
     left: 7px;
     top: 0.8em;
     width: 10px;
     height: 10px;
     margin-top: -7px;
     -webkit-user-select: none;
     background-image: url(Images/toolbarButtonGlyphs.png);
-    background-size: 352px 144px;
+    background-size: 352px 168px;
 }
 
 @media (-webkit-min-device-pixel-ratio: 1.5) {
 .database-user-query::before,
 .database-query-prompt::before,
 .database-query-result::before {
     background-image: url(Images/toolbarButtonGlyphs_2x.png);
 }
 } /* media */
 
@@ skipping 178 matching lines @@
     content: url(Images/cookie.png);
 }
 
 .application-cache-storage-tree-item .icon {
     content: url(Images/applicationCache.png);
 }
 
 .file-system-storage-tree-item .icon {
     content: url(Images/fileSystem.png);
 }