Reader Fixes (#951)

* Normalized paths on download controller and when scan is killed due to missing or empty folders, log a critical error.

* Tweaked the query for OnDeck to better promote recently added chapters in a series with read progress, but it's still not perfect.

* Fixed an issue where up/down key weren't working unless you clicked on the book explicitly

* Fixed an issue where infinite scroller was broken in fullscreen mode

* When toggling fullscreen mode on infinite scroller, the current page is retained as current position

* Fixed an issue where a double render would occur when we didn't need to render as fit split

* Stop showing loader when not using fit split

API/Controllers/DownloadController.cs

@@ -153,7 +153,7 @@ namespace API.Controllers
             var files = (await _unitOfWork.UserRepository.GetAllBookmarksByIds(downloadBookmarkDto.Bookmarks
                 .Select(b => b.Id)
                 .ToList()))
-                .Select(b => _directoryService.FileSystem.Path.Join(bookmarkDirectory, b.FileName));
+                .Select(b => Parser.Parser.NormalizePath(_directoryService.FileSystem.Path.Join(bookmarkDirectory, b.FileName)));
 
             var (fileBytes, _) = await _archiveService.CreateZipForDownload(files,
                 tempFolder);