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
There's one copy for every stack. It doesn't matter which one we take as long as they have the same name. Global is always present, even in single extrusion. Seems the most logical one to display.
Contributes to issue CURA-3935.