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/Feed.cs

@@ -23,7 +23,7 @@ namespace API.DTOs.OPDS
         public string Icon { get; set; } = "/favicon.ico";
 
         [XmlElement("author")]
-        public Author Author { get; set; } = new Author()
+        public FeedAuthor Author { get; set; } = new FeedAuthor()
         {
             Name = "Kavita",
             Uri = "https://kavitareader.com"

API/DTOs/OPDS/FeedAuthor.cs

@@ -2,7 +2,7 @@
 
 namespace API.DTOs.OPDS
 {
-    public class Author
+    public class FeedAuthor
     {
         [XmlElement("name")]
         public string Name { get; set; }