Fix filter type group using modelClass when 500+ options are available.

[LukeTowers]

Review and implement octobercms/october#5470

[github-actions]

This issue will be closed and archived in 3 days, as there has been no activity in the last 60 days.
If this issue is still relevant or you would like to see it actioned, please respond and we will re-open this issue.
If this issue is critical to your business, consider joining the Premium Support Program where a Service Level Agreement is offered.

[github-actions]

This issue will be closed and archived in 3 days, as there has been no activity in the last 60 days.
If this issue is still relevant or you would like to see it actioned, please respond and we will re-open this issue.
If this issue is critical to your business, consider joining the Premium Support Program where a Service Level Agreement is offered.