Fix drawer height errors and drawers that hit the carcass

Unfix affected drawers so the system recalculates, and reduce box height when a drawer collides with the carcass.

1. If a height error appears, unfix the affected drawers so the system can recalculate the space.

2. If a drawer does not fit or hits the carcass, the cause is usually the box height rather than the drawer height; reduce the box height for the affected drawer so it fits without colliding with the carcass.