DevTools: CSS cleanup.

Source/devtools/front_end/inspectorStyle.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 1778 matching lines @@
     background-image: linear-gradient(to bottom, rgb(252, 252, 252), rgb(223, 223, 223));
     border-radius: 12px;
     -webkit-appearance: none;
 }
 
 .pane-title-button:active {
     background-color: rgb(215, 215, 215);
     background-image: linear-gradient(to bottom, rgb(194, 194, 194), rgb(239, 239, 239));
 }
 
-#console-messages.console-filter-top {
-    margin-top: 23px;
-}
-
 .console-warning-level.repeated-message,
 .console-error-level.repeated-message,
 .console-log-level.repeated-message,
 .console-debug-level.repeated-message,
 .console-info-level.repeated-message {
     display: -webkit-flex;
 }
 
 .console-user-command-result {
     display: block;
@@ skipping 46 matching lines @@
 }
 
 .sidebar-tree > .children > .sidebar-tree-item {
     padding-left: 37px;
 }
 
 .sidebar-tree > .children > .children > .sidebar-tree-item {
     padding-left: 37px;
 }
 
-.sidebar-tree.some-expandable:not(.hide-disclosure-buttons) > .sidebar-tree-item:not(.parent) .icon {
+.sidebar-tree.some-expandable > .sidebar-tree-item:not(.parent) .icon {
     margin-left: 16px;
 }
 
 .sidebar-tree-item .disclosure-button {
     float: left;
     width: 10px;
     height: 10px;
     border: 0;
     -webkit-mask-image: url(Images/statusbarButtonGlyphs.png);
     -webkit-mask-size: 320px 144px;
@@ skipping 893 matching lines @@
     outline: none;
 }
 
 body.inactive select.chrome-select,
 .chrome-select:disabled {
     background-image: -webkit-image-set(url(Images/chromeDisabledSelect.png) 1x, url(Images/chromeDisabledSelect_2x.png) 2x), linear-gradient(#f1f1f1, #f1f1f1 38%, #e6e6e6);
     border-color: rgba(80, 80, 80, 0.2);
     box-shadow: 0 1px 0 rgba(80, 80, 80, 0.08),
     inset 0 1px 2px rgba(255, 255, 255, 0.75);
     color: #aaa;
-}
+}