[Feature Request] Table Widget (aka `ListOperation` inside `ShowOperation`) aka. multiple existing list views in a show view

[timbertens]

A common case when having more complex applications is to have a master / details view on certain models.

eg. Customers with Contacts, Orders, Invoices, Complaints

It would be very handy if we could recuperate different functionalities in one screen

• have a show view of eg 'Customer' (preferable show like described in https://github.com/Laravel-Backpack/ideas/issues/99)
• and below that in eg. tabs the list view (the regular ones like used in 'standalone' list view) for related Contacts, Orders, Invoices, Complaints, etc. with all the standard functionality like already foreseen eg. sort, filter, eg.