Show category pills in article name view, delay new article button until loaded

- Display category breadcrumb chips below article name in ArticleViewName
- Only show NewArticleTile when articles are successfully loaded

src/pages/artikel/kategorien.jsx

@@ -462,7 +462,7 @@ class ArtikelKategorienPage extends Component {
           ))}
 
           {renameMode && <NewCategoryTile parentId={currentCategoryId} />}
-          {!renameMode && (
+          {!renameMode && articlesStatus === 'succeeded' && (
             <NewArticleTile
               parentId={currentCategoryId}
               onOpenArticle={this.handleArticleClick}