... so if we want to have 1 BWP configured at any given time we need to reconfigure BWP 1 every time. This means that since the gNB has more than 1 BWPs (for use for different UEs), that there is a "gNB BWP ID" (as used by the gNB), which can be any BWP ID X, and one "UE BWP ID", which is always 1. This commit implements this distinction.