fixes a problem when Cura starts with a single extruder printer but the
user then choose a multiextruder printer - CURA-4386
Also added a quality definition in UM3E extruder with the ids of the UM3
extruders, so that the profiles for UM3 are also valid for UM3E and viceversa - CURA-4389
All are related issues with profiles and multiextruder printers