CURA-4451
- Add upgrade script for 3.0. to 3.1
- Upgrade old stack files so they will use "empty_quality" as the
"Not Supported" quality profile.
- Increase SettingVersion to 4
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.
Since we want the profile to be selected based on material and we have
profiles like "ABS Normal" and "PLA Normal" we need some way to make
sure we select the same.
Contributes to CURA-2006