JQL: It will be great if we show auto complete options for custom fields using project information like project picker, user picker

Steps:
1. Login to JIRA.
2. Create custom fields of type user picker, project picker, multi user picker, version picker.
3. In the JQL search dialog, create query with custom field of user type/project picker/version picker.

Result:
1. User doesn't get option as auto complete.

Expected:
1. It will be great if we decide to extend the support to custom field using project values.