What configuration page? Are you referring to openHAB Scenes (as opposed to KNX scenes or some other config)?
I think both the Item name and the Item label need to be shown there because the Item label is not guaranteed to be unique and many leave equipment and location out of the labels (e.g. they might have five Items labeled “Temperature”). Completely switching to the label would just change who is impacted by this behavior and not actually solve it.
See How to file an Issue for instructions on how to create a feature request issue on the openhab-webuis repo.