Misc Fixes and Changes (#927)

* Cleaned up a ton of warnings/suggestions from the IDE.

* Fixed a bug when clearing the filters some presets could be undone.

* Renamed a class in the OPDS spec

* Simplified logic for when Fit To Screen rendering logic occurs. It now works always rather than only on cover images.

* Give some additional info to the user on what the differences between Library Types are

* Don't scan .qpkg folders (QNAP devices)

* Refactored some code to enable ability to test CoverImage Test. This is a broken test, test.zip is waiting on an issue in NetVips.

* Fixed an issue where Extra might get flagged as special too early, if in a word like Extraordinary

* Cleaned up the regex for the extra issue to be more flexible

API/Services/MetadataService.cs

@@ -193,7 +193,6 @@ public class MetadataService : IMetadataService
     /// <param name="forceUpdate">Force updating cover image even if underlying file has not been modified or chapter already has a cover image</param>
     public async Task RefreshMetadata(int libraryId, bool forceUpdate = false)
     {
-        // TODO: Think about splitting the comicinfo stuff into a separate task
         var library = await _unitOfWork.LibraryRepository.GetLibraryForIdAsync(libraryId, LibraryIncludes.None);
         _logger.LogInformation("[MetadataService] Beginning metadata refresh of {LibraryName}", library.Name);