erp5_ods_style: fix the way to get form id

if i have a url like:
https://erp5xxx/form_idxxx?relative_item_relative_url=item_module/7817

with the old way, form id will be 7817

/reviewed-on nexedi/erp5!824

bt5/erp5_ods_style/SkinTemplateItem/portal_skins/erp5_ods_core/Folder_getContentListAsODSReportSectionList.py

@@ -16,7 +16,7 @@ def getReportSectionListForObject(doc):
                                            title = title,
                                            form_id = None))
   for action in portal.portal_actions.listFilteredActionsFor(doc)['object_view']:
-    form_id = action['url'].split('/')[-1].split('?')[0]
+    form_id = action['url'].split('?')[0].split('/')[-1]
     action_title = action['title']
     if action_title != 'History' and action_title != 'Metadata':
       report_section_list.append(ReportSection(path = doc.getPath(),