Auto Collection Bugfixes (#1769)

* SeriesGroup tag can now have comma separated value to allow a series to be a part of multiple collections.

* Added a missing unit test

* Refactored how collection tags are created to work in the scan loop reliably.

* Added a unit test for RemoveTagsWithoutSeries

* Fixed a bug in reading list title generation to avoid Volume 0 if the underlying file had a title set. Fixed a misconfigured unit test.

API/Data/Repositories/SeriesRepository.cs

@@ -199,6 +199,9 @@ public class SeriesRepository : ISeriesRepository
         var query = _context.Series
             .Where(s => s.LibraryId == libraryId)
 
+            .Include(s => s.Metadata)
+            .ThenInclude(m => m.CollectionTags)
+
             .Include(s => s.Metadata)
             .ThenInclude(m => m.People)