Eco Accounts

* adds related eco account withdraw detail view to intervention detail view
* adds new route for removing withdraws using RemoveModalForm
* adds EcoAccountWithdraw model
* adds admin interfaces for EcoAccount and EcoAccountWithdraw
* adds message_templates.py to konova/utils for reusable messages
* splits related-documents.html and related-objects.html into separate templates for each related object type: compensations.html, documents.html, eco-account-withdraws.html and payments.html
* adds translations

compensation/urls.py

@@ -30,4 +30,8 @@ urlpatterns = [
     path('acc/<id>', account_open_view, name='acc-open'),
     path('acc/<id>/edit', account_edit_view, name='acc-edit'),
     path('acc/<id>/remove', account_remove_view, name='acc-remove'),
+
+    # Eco-account withdraws
+    path('acc/<id>/remove/<withdraw_id>', withdraw_remove_view, name='withdraw-remove'),
+
 ]