configuration settings for the sort:
- .fields - (Array) List of sortable fields containing:
- .id - (String) Unique Id for the sort field
- .title - (String) The title to display for the sort field
- .sortType - (String) The sort type, 'alpha' or 'numeric'
- .currentField - (Object) Currently selected field
- .isAscending - (boolean) Current sort direction is ascending. True for ascending, False for descending
- .onSortChange - ( function(sortId, sortDirection ) Function to call when the current sort params change