Feature/library show number of mangas in category (#269)

* Pass optional browser tab only title

Makes it possible to have a different title for the "NavBar" and the browser tab

* Show number of items in category and library

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Co-authored-by: schroda <github@dasch.simplelogin.com>

src/typings.ts

@@ -179,6 +179,7 @@ export interface ICategory {
     name: string;
     default: boolean;
     meta: Metadata;
+    size: number;
 }
 
 export interface INavbarOverride {
@@ -361,6 +362,7 @@ export interface LibraryOptions {
     unread: NullAndUndefined<boolean>;
     sorts: NullAndUndefined<LibrarySortMode>;
     sortDesc: NullAndUndefined<boolean>;
+    showTabSize: boolean;
 }
 
 export interface BatchChaptersChange {