[DevTools] Handle blocked urls disabled state better in UI

third_party/WebKit/Source/devtools/front_end/network/blockedURLsPane.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.
  */
 
 .list {
     border: none !important;
     border-top: 1px solid #dadada !important;
 }
 
+.blocking-disabled {
+    pointer-events: none;
+    opacity: 0.8;
+}
+
 .editor-container {
     padding: 0 4px;
 }
 
 .no-blocked-urls, .blocked-urls {
     overflow-x: hidden;
     overflow-y: auto;
 }
 
 .no-blocked-urls {
@@ skipping 13 matching lines @@
     flex: auto;
 }
 
 .blocked-url-count {
     flex: none;
     padding-right: 9px;
 }
 
 .blocked-url-checkbox {
     margin-left: 8px;
+    flex: none;
 }
 
 .blocked-url-label {
     white-space: nowrap;
     text-overflow: ellipsis;
     overflow: hidden;
     flex: auto;
     padding: 0 3px;
 }
 
@@ skipping 12 matching lines @@
     color: #222;
     flex: 1 1 0px;
     overflow: hidden;
 }
 
 .blocked-url-edit-row input {
     width: 100%;
     text-align: inherit;
     height: 22px;
 }