DevTools: add entry points for command menu

third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css

Index: third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css b/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
index ab6f32027bf6ac29a1aa022e20d6a50300a878b1..da591de1b9a146e21bcf863e4ac83719c73822db 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
+++ b/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
@@ -50,7 +50,27 @@
     text-align: center;
     margin-top: 20px;
     text-shadow: rgba(255, 255, 255, 0.75) 0 1px 0;
-    white-space: pre;
+    line-height: 28px;
+    overflow: hidden;
+}
+
+.tabbed-pane-placeholder-row {
+    display: flex;
+    white-space: nowrap;
+}
+
+.tabbed-pane-placeholder-key {
+    flex: 1;
+    text-align: right;
+    padding-right: 14px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+}
+
+.tabbed-pane-placeholder-value {
+    flex: 1;
+    text-align: left;
+    padding-left: 14px;
 }
 
 .tabbed-pane-header {