Bug 186235 Help Index should have an entry for "tooltips"

p=giacomo.magnini@portalis.it r=me

suite/locales/en-US/chrome/common/help/cs_nav_prefs_appearance.xhtml

@@ -83,9 +83,10 @@
         only.</li>
     </ul>
   </li>
-  <li><strong>Show Tooltips</strong>: Select this if you want to have tips
-    appear when the cursor is placed over parts of the &brandShortName;
-    user interface and some websites.</li>
+  <li><strong>Show Tooltips</strong>: Select this if you want to have 
+    <a href="glossary.xhtml#tooltip">tooltips</a> appear when the cursor
+    is placed over parts of the &brandShortName; user interface and some
+    websites.</li>
   <li><strong>Show Website Icons</strong>: Select this if you want see
     site-specific icons, if available, in place of the bookmark icon
     <img src="chrome://communicator/skin/bookmarks/bookmark-item.gif"

suite/locales/en-US/chrome/common/help/glossary.xhtml

@@ -673,6 +673,10 @@
 <dt id="token">token</dt><dd> See <a href="#security_device">security
   device</a>.</dd>
 
+<dt id="tooltip">tooltip</dt><dd> A small box with text that appears when
+  you hover your mouse's cursor over certain items. It usually contains
+  information regarding the item being hovered over.</dd>
+
 <dt id="transmission_control_protocol_internet_protocol">
   Transmission Control Protocol/Internet Protocol (TCP/IP)</dt><dd>A Unix
   protocol used to connect computers running a variety of operating systems.