PyDMSpinBox always takes limits from PV even when user defined limits are set

PyDMSpinBox always takes limits from PV even when user defined limits are set: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). https://github.com/slaclab/pydm/blob/1dd59b9d8a700926c774ca27e522e843a5302164/pydm/widgets/spinbox.py L159-L175