Redirect user to the previous page after logging in (#1679).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1695 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/account/login.rhtml

@@ -1,5 +1,6 @@
 <div id="login-form">
 <% form_tag({:action=> "login"}) do %>
+<%= back_url_hidden_field_tag %>
 <table>
 <tr>
     <td align="right"><label for="username"><%=l(:field_login)%>:</label></td>