erp5_item: fallback on future Tracking List by default

bt5/erp5_item/SkinTemplateItem/portal_skins/erp5_item/Item_getAffectationList.xml

@@ -77,7 +77,7 @@ return affectation_list\n
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>at_date=None, fallback_on_future=False, **kw</string> </value>
+            <value> <string>at_date=None, fallback_on_future=True, **kw</string> </value>
         </item>
         <item>
             <key> <string>id</string> </key>