accounting: Always show "Group Analytics" on Trial Balance Dialog

This field was only displayed if any of these was enabled:
 - by function analytics
 - by project analytics
 - by category analytics

and it allows requesting reports per function, project, categories and
section.

The problem is that if any analytics was explicitly enabled, we never
allow users to get a break down by section.

Always display the field, so that user can always select section.

This does not make much sense when there's only one section though.

/reviewed-on nexedi/erp5!939

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/AccountModule_viewTrialBalanceReportDialog/your_group_analytic.xml

@@ -122,9 +122,7 @@
                 </item>
                 <item>
                     <key> <string>enabled</string> </key>
-                    <value>
-                      <persistent> <string encoding="base64">AAAAAAAAAAI=</string> </persistent>
-                    </value>
+                    <value> <string></string> </value>
                 </item>
                 <item>
                     <key> <string>external_validator</string> </key>
@@ -141,7 +139,7 @@
                 <item>
                     <key> <string>items</string> </key>
                     <value>
-                      <persistent> <string encoding="base64">AAAAAAAAAAM=</string> </persistent>
+                      <persistent> <string encoding="base64">AAAAAAAAAAI=</string> </persistent>
                     </value>
                 </item>
                 <item>
@@ -246,19 +244,6 @@
     </pickle>
   </record>
   <record id="2" aka="AAAAAAAAAAI=">
-    <pickle>
-      <global name="TALESMethod" module="Products.Formulator.TALESField"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>_text</string> </key>
-            <value> <string>context/AccountModule_getAnalyticColumnList</string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-  <record id="3" aka="AAAAAAAAAAM=">
     <pickle>
       <global name="TALESMethod" module="Products.Formulator.TALESField"/>
     </pickle>