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.Tests/Helpers/PersonHelperTests.cs

@@ -103,7 +103,7 @@ public class PersonHelperTests
             DbFactory.Person("Joe Shmo", PersonRole.CoverArtist)
         };
         var peopleRemoved = new List<Person>();
-        PersonHelper.RemovePeople(existingPeople, Array.Empty<string>(), PersonRole.Writer, person =>
+        PersonHelper.RemovePeople(existingPeople, new List<string>(), PersonRole.Writer, person =>
         {
             peopleRemoved.Add(person);
         });