Revert "additionalScaleFactors -> scaleFactors"

This reverts commit c7bf86893438e07c9caf5f0aac4e8efe8bfa2020.

This wasn't intended for this branch.
Revert "Introduce project file versions and migrations."

This reverts commit e17fabfa1dfc4c22a8d78eb91993bd7d0a38e429.

This wasn't intended for this branch.