DevTools: make sidebar section headers wider.

third_party/WebKit/Source/devtools/front_end/sources/uiList.css

 /*
  * Copyright 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.
  */
 
 .list-item {
     padding: 2px 8px 3px 8px;
     position: relative;
-    min-height: 18px;
+    min-height: 26px;
     white-space: nowrap;
+    align-items: center;
+    display: flex;
 }
 
 .list-item:nth-of-type(2n) {
     background-color: #f8f8f8;
 }
 
 .list-item.selected {
     background-color: #dadada;
 }
 
@@ skipping 31 matching lines @@
 .list-item.label .subtitle {
     font-style: italic;
     font-weight: bold;
     color: #999;
 }
 
 .list-item.dimmed {
     opacity: 0.6;
     font-style: italic;
 }