Recently Added Chapter Feedback (#1020)

* Added an alt implementation which shows Recently Added chapters. No extra grouping is performed if multiple chapters per volume.

* Started working on a grouping implementation for series.

* Disabled the code for bookmarks cleanup as there is some critical issue in there.

* Implemented a Series Group activity stream which shows recently updated series and providers a count badge showing how many new chapters/volumes were added in that series.

* Removed the bookmark disabling code

* Cleaned up code

* One more code cleanup

API/Services/Tasks/CleanupService.cs

@@ -199,8 +199,6 @@ namespace API.Services.Tasks
                     _directoryService.FileSystem.Directory.Delete(directory, false);
                 }
             }
-
-
         }
     }
 }