DevTools: Create 2D slider for shadow-editor offset

third_party/WebKit/Source/devtools/front_end/ui/slider.css

 /*
  * Copyright 2016 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.
  */
 
 .dt-range-input {
     -webkit-appearance: none;
     margin: 0;
     padding: 0;
-    height: 12px;
+    height: 10px;
     width: 88px;
     outline: none;
     background: none;
 }
 
 .dt-range-input::-webkit-slider-thumb {
     -webkit-appearance: none;
     margin: 0;
     padding: 0;
     border: 0;
@@ skipping 12 matching lines @@
     height: 2px;
     background-color: rgba(0, 0, 0, 0.26);
 }
 
 .dt-range-input:focus::-webkit-slider-thumb {
     box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.4);
 }
 
 .dt-range-input:disabled::-webkit-slider-thumb {
     background-color: #bdbdbd;
-}
+}