Add a warning about a non-straightforward behaviour of activity listing page.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@17634 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFActivity/dtml/manageActivities.dtml

@@ -30,6 +30,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 <dtml-var manage_tabs>
 
 <h3>Queued Activities</h3>
+<p>Warning: Invoking or canceling activities will invoke/cancel all activities with both the same path and the same method_id.</p>
 <table cellspacing="0" cellpadding="2" border="1">
   <tr>
     <th align="left" valign="top"></th>