[IMP] Add upload state tracking on EBICS payment files

account_ebics:
- Add pain_state and ebics_order_number to ebics.file
- Set these fields after a successful upload
- Add neutralized property to api.Environment

account_ebics_batch_payment:
- Add EBICS notebook page with upload info to batch payment form
- Post chatter message with OrderID after upload

account_ebics_payment_order:
- Fix broken postprocess: replace deprecated active_model/active_id
  context keys with model/id

account_ebics/views/ebics_file_views.xml

@@ -135,6 +135,10 @@
                                 string="Upload Date"
                                 invisible="context.get('ebics_mode') == 'down'"
                             />
+                            <field
+                                name="ebics_order_number"
+                                invisible="context.get('ebics_mode') != 'up'"
+                            />
                             <field name="user_id" />
                             <field name="ebics_userid_id" />
                         </group>