Allow using different custom field types to be used in the business project list view filters

Issue Summary

We are currently not able to use all custom field types in the business project List view filters. 

Steps to Reproduce

1. Create a new custom field type  User Picker (multiple users) and associate it to a business project screen;
2. Check to see if the field is available in the List view filters(fields);

Expected Results

The field won't be listed, only custom fields with User Picker (single user) can be added to the List view filters.

Actual Results

Only User Picker (single user) can be listed in the Business List view filters. When a User Picker (multiple users) was added to the project field configuration, it was not accessible in the List view filters.

Workaround

The is no known workaround at the moment.