DevTools: add title to computed fonts section

Source/devtools/front_end/elementsPanel.css

Index: Source/devtools/front_end/elementsPanel.css
diff --git a/Source/devtools/front_end/elementsPanel.css b/Source/devtools/front_end/elementsPanel.css
index 549e0d1901e07ed48e9af3ea6d501e66112776cf..c56474f7709d99f1d2a44377d482e9306c885e04 100644
--- a/Source/devtools/front_end/elementsPanel.css
+++ b/Source/devtools/front_end/elementsPanel.css
@@ -579,21 +579,21 @@
     -webkit-justify-content: center;
 }
 
-.sidebar-pane.composite .computed-style {
-    border-bottom: 1px solid rgb(64%, 64%, 64%);
-}
-
 .sidebar-pane.composite .metrics-and-computed .sidebar-pane-toolbar {
     margin-top: 4px;
     margin-bottom: -4px;
     position: relative;
 }
 
-.sidebar-pane.composite .platform-fonts {
+.sidebar-pane.composite .platform-fonts .body {
     padding: 1ex;
     -webkit-user-select: text;
 }
 
+.sidebar-pane.composite .platform-fonts .sidebar-separator {
+    border-top: none;
+}
+
 .sidebar-pane.composite .platform-fonts .stats-section {
     margin-bottom: 5px;
 }