Random Changes and Enhancements (#1819)

* When skipping over folders in a scan, inform the ui

* Try out new backout condition for library watcher.

* Tweaked the code for folder watching to be more intense on killing if stuck in inotify loop.

* Streamlined my implementation of enhanced LibraryWatcher

* Added new extension method to make complex where statements cleaner.

* Added an implementation to flatten series and not show them if they have relationships defined. Only the parent would show. Currently disabled until i figure out how to apply it.

* Added the ability to collapse series that are not the primary entry point to reading. Configurable in library settings, only applies when all libraries in a filter have the property to true.

* Exclude from parsing .@_thumb directories, a QNAP system folder.

Show number of items a JumpKey has

* Refactored some time reading to display in days, months, years or minutes.

API/Services/DirectoryService.cs

@@ -89,7 +89,7 @@ public class DirectoryService : IDirectoryService
     private readonly ILogger<DirectoryService> _logger;
 
     private static readonly Regex ExcludeDirectories = new Regex(
-        @"@eaDir|\.DS_Store|\.qpkg|__MACOSX|@Recently-Snapshot|@recycle",
+        @"@eaDir|\.DS_Store|\.qpkg|__MACOSX|@Recently-Snapshot|@recycle|\.@__thumb",
         RegexOptions.Compiled | RegexOptions.IgnoreCase,
         Tasks.Scanner.Parser.Parser.RegexTimeout);
     private static readonly Regex FileCopyAppend = new Regex(@"\(\d+\)",