Hide unedited LHS and RHS fillers instead of deleting them

Hide left-hand-side and right-hand-side fillers that have not been edited directly in the design rather than deleting them.

1. Left-hand-side and right-hand-side fillers that have not been edited can be hidden directly in the design rather than deleted.

   ✓ Verificato nel prodotto il 10 ottobre 2026