Adding some helpful focus the form functionality for logon and setup

--HG--
branch : dev

src/Orchard.Web/Modules/Orchard.Users/Views/Account/LogOn.ascx

@@ -24,4 +24,5 @@
             <%=Html.AntiForgeryTokenOrchard()%>
             <input type="submit" value="<%=_Encoded("Log On") %>" />
     </fieldset>
-<% } %>
+<% } %><%
+using (this.Capture("end-of-page-scripts")) { %><script type="text/javascript">$("#username").closest("form").helpfullyFocus();</script><% } %>