Navbar: Added not about ui-state-persist doesn't work with external toolbars. Addresses jquery-archive/jquery-mobile#6559

Author: jaspermdegroot

entries/navbar.xml

@@ -29,6 +29,8 @@
 </div><!-- /navbar -->
 </code></pre>
 
+		<p>Note that this on applies to navbars that are inside a page. If you use a true persistent toolbar that lives outside the page and want to set current item to the active state, you have to add a script that adds the <code>class="ui-btn-active"</code> class.</p>
+
 		<p>The navbar items are set to divide the space evenly so in this case, each button is 1/2 the width of the browser window:
 		<iframe src="/resources/navbar/example1.html" style="width:100%;height:90px;border:0px"></iframe></p>