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/DTOs/OPDS/Author.cs

@@ -1,12 +0,0 @@
-using System.Xml.Serialization;
-
-namespace API.DTOs.OPDS
-{
-    public class Author
-    {
-        [XmlElement("name")]
-        public string Name { get; set; }
-        [XmlElement("uri")]
-        public string Uri { get; set; }
-    }
-}