External Facing Forms: Multi-Select / Drop-down Fields - Allow Type Ahead

On the external, end-user facing forms via the help center portal, I think it would be helpful to make a multi-select or drop-down custom field be searchable by allowing "type ahead" functionality.  This way end-users don't have to scroll through a long list of options potentially.  Agents can currently do this in the Support UI on both drop down fields and multi-select fields.