DevTools: make dropdown arrow spacing nicer

third_party/WebKit/Source/devtools/front_end/ui/toolbar.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.
  */
 
 :host {
     flex: none;
     padding: 0 2px;
 }
@@ skipping 37 matching lines @@
     justify-content: center;
     padding: 0;
     height: 26px;
     border: none;
     color: #5a5a5a;
 }
 
 .toolbar-dropdown-arrow {
     background-color: #6D6D6D;
     pointer-events: none;
-    margin: auto 0;
     flex: none;
 }
 
 /* Toolbar item */
 
 .toolbar-button {
     white-space: nowrap;
     overflow: hidden;
     min-width: 28px;
     background: transparent;
@@ skipping 126 matching lines @@
     display: inline-flex;
     flex-shrink: 0;
     margin-right: 6px;
 }
 
 select.toolbar-item {
     min-width: 38px;
     -webkit-appearance: none;
     border: 0;
     border-radius: 0;
-    padding: 0 8px 0 5px;
+    padding: 0 13px 0 5px;
     margin-right: -10px;
     position: relative;
 }
 
 /* Input */
 
 .toolbar-input {
     width: 120px;
     height: 20px;
     padding: 3px;
@@ skipping 62 matching lines @@
     margin-top: -1px;
     width: 28px;
     left: -2px;
 }
 
 span.toolbar-select-container.toolbar-item.warning {
     background: #ffd7d7;
     padding: 0 5px 0 0;
     margin-right: 1px;
 }