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/Controllers/SettingsController.cs

@@ -63,11 +63,6 @@ namespace API.Controllers
         {
             _logger.LogInformation("{UserName} is resetting Server Settings", User.GetUsername());
 
-
-            // We do not allow CacheDirectory changes, so we will ignore.
-            // var currentSettings = await _unitOfWork.SettingsRepository.GetSettingsAsync();
-            // currentSettings = Seed.DefaultSettings;
-
             return await UpdateSettings(_mapper.Map<ServerSettingDto>(Seed.DefaultSettings));
         }