Implement a way to retrieve the most frequent values for a field

[jrdh]

This could be through vds_multi_autocomplete_value or a new endpoint. If it's through vds_multi_autocomplete_value then it could either be used as a sort when the prefix is empty, or it could be another option to this action (i.e. sort order: alphabetical or frequency).

Whether this is a new action or reuses an existing action probably depends on how vds_multi_autocomplete_value is implemented and whether a sort can be added to it.

This is dependant on the preps changes.

[alycejenni]

Is there actually much point in having autocomplete results sorted alphabetically anyway, especially by default? If you're using an autocomplete you presumably want the most relevant results first, which is more likely to be the frequently used values.