Group on indent right and ungroup on indent left (single column)

[tehzu9]

hi! is it possible without making a hidden column? i had placed indent buttons working fine. also replacing classes of span.collapse/.expand but the sheet doesn't load and if it loads the whole row is wiped out. on scroll it appears again as it was before editing or indenting. can you please show the solution (if any) on jsfiddle, i will be very grateful