Implemented the ability to allow the admin to change the cover generation size. (#2213)

Changed how covers are merged together. Now a cover image will always be generated for reading list and collections.

Fixed reading list page being a bit laggy due to a missing trackby function.

Reading list page will now show the cover image always. Collection detail page will only hide the image if there is no summary on the collection.

API/Helpers/Converters/ServerSettingConverter.cs

@@ -79,6 +79,9 @@ public class ServerSettingConverter : ITypeConverter<IEnumerable<ServerSetting>,
                 case ServerSettingKey.OnDeckUpdateDays:
                     destination.OnDeckUpdateDays = int.Parse(row.Value);
                     break;
+                case ServerSettingKey.CoverImageSize:
+                    destination.CoverImageSize = Enum.Parse<CoverImageSize>(row.Value);
+                    break;
             }
         }