Previously, quality item was split into a second part for only the
Preferred size settings, because at one point both Radarr and Sonarr
didn't support them the same. However, that has changed now so they are
now consolidated.
When preferred was null, it was not considered for change detection.
This was a regression likely introduced to support Radarr, which does
not have a preferred setting.
- Fixes#301
- Likely fixes#193 as well, which is a duplicate.
Multiple path fragments are now supported in the built-in
`SubDirectory()` extension method, so there's no longer a need for the
custom `SubDir()` version.
Robert Dailey