Suppress 'AttributeError: call_traceback' in a log caused by ActivityTool_viewActivityList.

Also move 'call_traceback' to 'More Columns'.

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/ActivityTool_viewActivityList/listbox.xml

@@ -10,6 +10,7 @@
             <key> <string>delegated_list</string> </key>
             <value>
               <list>
+                <string>all_columns</string>
                 <string>columns</string>
                 <string>count_method</string>
                 <string>editable_columns</string>
@@ -88,6 +89,17 @@
             <key> <string>values</string> </key>
             <value>
               <dictionary>
+                <item>
+                    <key> <string>all_columns</string> </key>
+                    <value>
+                      <list>
+                        <tuple>
+                          <string>call_traceback</string>
+                          <string>Call Traceback</string>
+                        </tuple>
+                      </list>
+                    </value>
+                </item>
                 <item>
                     <key> <string>columns</string> </key>
                     <value>
@@ -136,10 +148,6 @@
                           <string>processing</string>
                           <string>Processing</string>
                         </tuple>
-                        <tuple>
-                          <string>call_traceback</string>
-                          <string>Call Traceback</string>
-                        </tuple>
                       </list>
                     </value>
                 </item>

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/ActivityTool_viewActivityList/listbox_call_traceback.xml

@@ -71,6 +71,10 @@
                     <key> <string>target</string> </key>
                     <value> <string></string> </value>
                 </item>
+                <item>
+                    <key> <string>title</string> </key>
+                    <value> <string></string> </value>
+                </item>
               </dictionary>
             </value>
         </item>
@@ -114,7 +118,7 @@
             <key> <string>_text</string> </key>
             <value> <string encoding="cdata"><![CDATA[
 
-python: "<pre>" + cell.call_traceback + "</pre>"
+python: \'<pre>\' + getattr(cell, \'call_traceback\', \'\') + \'</pre>\'
 
 ]]></string> </value>
         </item>