Show how we could configure expanding selected db items

[przepompownia]

Example config:

let g:db_ui_drawer_settings = {
  \ 'databases': {
    \ 'dev': {
      \ 'tables': {
        \ 'expanded': 1,
        \ 'place_cursor': 1
  \       }
  \     }
  \   }
  \ }

[przepompownia]

It only shows how we could configure expanding of selected items at the start. It still does not populate table list as it should (or as if it does so on manual expansion).