You could always move all of the bones just slightly and use the compensate images button to avoid influencing the images, then put the bones back without images compensation so that they are centered, maybe. Tools - Spine User Guide: Compensation
Alternative: filter the tree on attachments so you can select them all, then manually type in the translate input box +5, or +-5 while in world axis to offset the images by that set amount.
Tools - Spine User Guide: Numeric entry
