DevTools: only allow status bar items in status bars.

Source/devtools/front_end/profiler/profilesPanel.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 46 matching lines @@
 .profile-view .data-grid span.percent-column {
     color: #999;
     width: 48px;
     display: inline-block;
 }
 
 .profile-view .data-grid tr.selected span {
     color: inherit;
 }
 
-.profiles.panel .status-bar {
-    border-bottom: 1px solid rgb(202, 202, 202);
-    border-top: none;
-}
-
 .profiles-status-bar {
+    display: flex;
     background-color: #eee;
     flex: 0 0 23px;
+    flex-direction: row;
+    border-bottom: 1px solid rgb(202, 202, 202);
 }
 
 .profile-launcher-view-tree-item > .icon {
     width: 4px !important;
     visibility: hidden;
 }
 
 .profiles-sidebar-tree-box {
     overflow: auto;
     flex: auto;
@@ skipping 191 matching lines @@
     bottom: 0;
 }
 
 #cpu-profile-flame-chart-overview-grid .resources-dividers-label-bar {
     pointer-events: auto;
 }
 
 .cpu-profile-flame-chart-overview-pane {
     flex: 0 0 80px !important;
 }