view.sort-selector filter argument mismatch in 4.0

[zerocrates]

The view.sort-select filter used in the Browse and SortSelector helpers don't take the same arguments.

The legacy sortSelector takes sortBy, an array with keyed contents for label and value, while the new browse helper takes sortConfig, a one-level key => value array of the options and labels.

One of these needs adjusting so it's the same as the other so modules can have a single sort-selector filter implementation regardless of the helper being used.