Added sort by last read (#254)

src/components/library/LibraryMangaGrid.tsx

@@ -70,6 +70,8 @@ const sortByTitle = (a: IMangaCard, b: IMangaCard): number => a.title.localeComp
 
 const sortByDateAdded = (a: IMangaCard, b: IMangaCard): number => a.inLibraryAt - b.inLibraryAt;
 
+const sortByLastRead = (a: IMangaCard, b: IMangaCard): number => b.lastReadAt - a.lastReadAt;
+
 const sortManga = (
     manga: IMangaCard[],
     sort: NullAndUndefined<LibrarySortMode>,
@@ -87,6 +89,9 @@ const sortManga = (
         case 'sortToRead':
             result.sort(sortByUnread);
             break;
+        case 'sortLastRead':
+            result.sort(sortByLastRead);
+            break;
         default:
             break;
     }

src/components/library/LibraryOptionsPanel.tsx

@@ -25,6 +25,7 @@ const SORT_OPTIONS: [LibrarySortMode, string][] = [
     ['sortToRead', 'By Unread chapters'],
     ['sortAlph', 'Alphabetically'],
     ['sortDateAdded', 'Date Added'],
+    ['sortLastRead', 'Last Read'],
 ];
 
 interface IProps {