This should make it a bit easier for others to create a new definition since there is less for them to 'have to know'. Previously they would be required to fill in as category Other, but now they can just leave the category out.
The material profiles are sent to UM3 with a manufacturer that's obtained from the printer definition rather than the material definition. The printer definition was 'Ultimaker' rather than 'Ultimaker B.V.' and the printer checked against this.
Contributes to issue CURA-4159.
This adds a set of variants that just set the nozzle diameter and nozzle tip diameter. These variants are not used until the machine action sets the has_variants metadata entry.
Add printer dialog now has sections by a configurable metadata property. A prefered section is set to always show on top.
Add weights to the Ultimaker printer definitions to create a sensible list (newest on top).
CURA-1593