placing smart groups

I welcome the new smart groups, but I’m a bit dismayed that they cannot be located within a database, along with the fixed groups. Is there any way to do this?

The only limitation is that global smart groups that search across multiple databases must stay in the Sidebar, but database smart groups can be located anywhere in the database group.

How do I create a database smart group?

Menu ‘Data>New>Smart Group’, the action menu button in the toolbar, or right-click in the root or in a group in the database.