add_sorter
Description:
Sort data in a given category by values of 'field'.
Aggregating results from multiple scopes often needs a clear way to sort the results, to do that you can define category-specific sorting
rules. As an example, a category displaying recent items might be sorted using a "timestamp" field (which would be defined as either a required
or optional metadata field Unity.Scope.metadata_schema). For categories that don't have any obvious order it is recommended to sort
them according to the "title" field.
Parameters:
| category_index |
Index of the sorted category |
| field |
Name of the field the order will be based on |
| flags |
The way sorting is performed |