Assign fund behind hidden designation selector

In GiveCampus giving forms, available controls depend on your permissions and the interface used by your institution.

Where supported, configure the intended fund as the form’s single default designation and hide the selector while retaining that real allocation; do not simply omit all designation configuration. Verify a completed gift and integration export. That existing default-selection path may meet the goal, but an institution-wide automatic backfill of past undesignated gifts is a separate support operation and is not implied by changing future form settings.