Revert "[#54028529] Bump up the backbone version to 1.0.0."

- Looks like the old survey builder breaks with the new backbone version

This reverts commit cc1dc471e93d0a8d06d3c41131b85f208b4776e1.
[#54028529] Test the change in QuestonsController made in 827dd08d5213bde3e605feb4dd9489371c697fec