Updated styles based on user testing and UX feedback.

Source/devtools/front_end/accessibility/AccessibilityStrings.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 WebInspector.AccessibilityStrings = {};
 
 WebInspector.AccessibilityStrings.AXAttributes = {
     "disabled" : {
         name : "Disabled",
         description : "If true, this element currently cannot be interacted with.",
@@ skipping 141 matching lines @@
     },
     "role": {
         name: "Role",
         description: "Indicates the purpose of this element, such as a user interface idiom for a widget, or structural role within a document.",
         group: "Default"
     },
     "value": {
         name: "Value",
         description: "The value of this element; this may be user-provided or developer-provided, depending on the element.",
         group: "Default"
+    },
+    "help": {
+        name: "Help",
+        descrption: "The computed help text for this element.",
+        group: "Default"
     }
 };