- Basic support for `AttributedString` type.
- `Debug` implementations across the board to ease debugging issues.
- Methods that take `Color` and `Font` types now accept an `AsRef` to
make implementing less of a headache.
- Cleanup of the `utils` module.
- Added support for basic Cursor management.
- Added support for NSWindow cancelOperation: callbacks. It's not...
perfect, but it works as a discrete hook.
- Added support for NSProgressIndicator.
- Properly forward Error types from QuickLook generation calls, and
future-proof the ThumbnailQuality enum.
- Add support for configuring Label line break mode.
