[DevTools] Expose left and right toolbar in TabbedPane.

third_party/WebKit/Source/devtools/front_end/settings/settingsScreen.css

 /*
  * Copyright (c) 2015 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.
  */
 
 .help-window-main {
     color: rgb(48, 57, 66);
     background-color: white;
     padding: 11px 0 0 0;
@@ skipping 162 matching lines @@
 
 .help-content input[type=checkbox] {
     margin: 1px 7px 1px 2px;
 }
 
 .help-content option {
     background-color: #EEEEEE;
     color: #222;
 }
 
-.help-window-label {
+.settings-window-title {
     font-size: 18px;
-    color: inherit;
-    padding: 1px 0 15px 17px;
-    flex: none;
+    color: rgb(48, 57, 66);
+    padding: 0 0 5px 13px;
 }
 
 .help-container-wrapper {
     position: absolute;
     top: 31px;
     left: 0px;
     right: 0;
     bottom: 0;
     overflow: auto;
     padding-top: 9px;
@@ skipping 134 matching lines @@
     display: none;
 }
 
 .settings-experiment-hidden label {
     background-color: #ddd;
 }
 
 .settings-developer-mode .settings-experiment-hidden {
     display: block;
 }