- Remove "author" from "metadata" section
- Add "hardware_type" for variants that don't have it
- Reformat "metadata" section to have the following order:
- setting_version
- type
- hardware_type
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