[DevTools] Fix overrides view when zoomed in.

Source/devtools/front_end/emulation/overrides.css

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
 }
 
 .overrides-view .field-error-message {
     display: none;
 }
 
 .overrides-view input[type='text']:focus::-webkit-input-placeholder {
     color: transparent !important;
 }
 
+.overrides-view > .tabbed-pane {
+    overflow: hidden;
+}
+
 /* Network tab */
 
 .overrides-network fieldset {
     padding-top: 5px;
 }
 
 .overrides-network fieldset p {
     width: 100%;
     margin-left: 2px;
 }
@@ skipping 196 matching lines @@
 #overrides-reset-button,
 #overrides-disable-button {
     margin: 9px 0 0 17px;
     display: block;
     width: 60px;
 }
 
 .overrides-enable-button {
     margin: 4px !important;
 }