change form used to display signature

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5963 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_base/ActionTemplateItem/portal_types/Agent/signature.xml

@@ -44,6 +44,10 @@
             <key> <string>id</string> </key>
             <value> <string>signature</string> </value>
         </item>
+        <item>
+            <key> <string>optional</string> </key>
+            <value> <int>0</int> </value>
+        </item>
         <item>
             <key> <string>permissions</string> </key>
             <value>
@@ -81,7 +85,7 @@
       <dictionary>
         <item>
             <key> <string>text</string> </key>
-            <value> <string>string:${object_url}/Image_viewFullSizedImage</string> </value>
+            <value> <string>string:${object_url}/Agent_viewFullSizedSignature</string> </value>
         </item>
       </dictionary>
     </pickle>