[ServiceWorker] Cache inspector out from flag, style & icon changes

Source/devtools/front_end/resources/indexedDBViews.css

 /*
  * Copyright (C) 2012 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 68 matching lines @@
 }
 
 .indexed-db-data-view .data-grid .data-container tr:nth-last-child(1) {
     background-color: white;
 }
 
 .indexed-db-data-view .data-grid .data-container tr:nth-last-child(1) td {
     border: 0;
 }
 
+.indexed-db-data-view .data-grid .data-container tr:nth-last-child(2) td {
+    border-bottom: 1px solid #aaa;
+}
+
 .indexed-db-data-view .section,
 .indexed-db-data-view .section > .header,
 .indexed-db-data-view .section > .header .title {
     margin: 0;
     min-height: inherit;
     line-height: inherit;
 }
 
 .indexed-db-data-view .primitive-value {
     padding-top: 1px;
 }
 
 .indexed-db-data-view .data-grid .data-container td .section .header .title {
     white-space: nowrap;
     text-overflow: ellipsis;
     overflow: hidden;
 }