Making these profiles use line distance prevents the user from setting their own density. This density is exactly equivalent.
Contributes to issue CURA-3491.
These are now upgraded to version 3, meaning that they will have to increase their version numbers and remove any start_layers_at_same_position settings they define. None of these profiles define any start_layers_at_same_position so it's just the version number then.
Contributes to issue CURA-3479.
The optimisation script didn't know that the temperature settings in material profiles now refers to default_material_print_temperature rather than material_print_temperature. This caused a few things to go wrong here.
Contributes to issue CURA-3433.
These materials are hard-coded in the optimisation script, so the optimisation script didn't know that those materials were materials and this caused a chain reaction where in the end the profile could only override XML-settings.
