Auto-arrange scroll bar items

Hey Community People, Staff & E-learning Heroes,

Thru this community, time & again I have been guided by the seasoned pros and I hope the same this time as well. Thanks team for that!!

I have to develop a interactive quiz for industrial workers, employed in packaging industry. Referring to attachment, the workers select their desired parameters and on left hand column and clicks the button and the list at the right gets populated with the packaging designs meeting selected parameters. By default, the right hand lists 27 packaging designs and when worker selects parameters the list on right gets filtered accordingly & list items are Auto-arranged.

Please help me to know how I can auto-arrange Right-column list items.

Thanks