Add mark-as-unread (#1995)

* Add mark-as-unread

https://github.com/FreshRSS/FreshRSS/issues/1966

* Change sentence

https://github.com/FreshRSS/FreshRSS/pull/1995#discussion_r214515954

* Enable mark-as-unread only when unread articles are shown

In order to prevent erroneous marking-as-unread.
We might find a better logic later.

* Disable instead of hide mark-as-unread option

To make it easier to discover

26 files changed, 66 insertions, 14 deletions

diff --git a/app/i18n/cz/feedback.php b/app/i18n/cz/feedback.php
index ff9c87d12..fe85a3599 100644
--- a/app/i18n/cz/feedback.php
+++ b/app/i18n/cz/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Aktualizovat',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Kategorie %s byla vytvořena.',
 			'deleted' => 'Kategorie byla smazána.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Kanál nelze aktualizovat',
 			'internal_problem' => 'RSS kanál nelze přidat. Pro detaily <a href="%s">zkontrolujte logy FreshRSS</a>.', // @todo
 			'invalid_url' => 'URL <em>%s</em> není platné',
-			'marked_read' => 'Kanály byly označeny jako přečtené',
 			'n_actualized' => '%d kanálů bylo aktualizováno',
 			'n_entries_deleted' => '%d článků bylo smazáno',
 			'no_refresh' => 'Nelze obnovit žádné kanály…',
diff --git a/app/i18n/cz/index.php b/app/i18n/cz/index.php
index cb0e5955d..48a28d4da 100644
--- a/app/i18n/cz/index.php
+++ b/app/i18n/cz/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Označit vše jako přečtené',
 		'mark_cat_read' => 'Označit kategorii jako přečtenou',
 		'mark_feed_read' => 'Označit kanál jako přečtený',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Nové nejdříve',
 		'non-starred' => 'Zobrazit vše vyjma oblíbených',
 		'normal_view' => 'Normální',
diff --git a/app/i18n/de/feedback.php b/app/i18n/de/feedback.php
index 2c46bbe56..c20f58487 100644
--- a/app/i18n/de/feedback.php
+++ b/app/i18n/de/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Aktualisieren',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Die Kategorie %s ist erstellt worden.',
 			'deleted' => 'Die Kategorie ist gelöscht worden.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Der Feed kann nicht aktualisiert werden',
 			'internal_problem' => 'Der RSS-Feed konnte nicht hinzugefügt werden. Für Details <a href="%s">prüfen Sie die FreshRSS-Protokolle</a>.', // @todo
 			'invalid_url' => 'Die URL <em>%s</em> ist ungültig',
-			'marked_read' => 'Die Feeds sind als gelesen markiert worden',
 			'n_actualized' => 'Die %d Feeds sind aktualisiert worden',
 			'n_entries_deleted' => 'Die %d Artikel sind gelöscht worden',
 			'no_refresh' => 'Es gibt keinen Feed zum Aktualisieren…',
diff --git a/app/i18n/de/index.php b/app/i18n/de/index.php
index df92d8085..1fa3e3933 100644
--- a/app/i18n/de/index.php
+++ b/app/i18n/de/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Alle als gelesen markieren',
 		'mark_cat_read' => 'Kategorie als gelesen markieren',
 		'mark_feed_read' => 'Feed als gelesen markieren',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Neuere zuerst',
 		'non-starred' => 'Alle außer Favoriten zeigen',
 		'normal_view' => 'Normale Ansicht',
diff --git a/app/i18n/en/feedback.php b/app/i18n/en/feedback.php
index a7fbda3a0..634b547f7 100644
--- a/app/i18n/en/feedback.php
+++ b/app/i18n/en/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Updating',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',
+			'marked_unread' => 'The articles have been marked as unread.',
+		),
 		'category' => array(
 			'created' => 'Category %s has been created.',
 			'deleted' => 'Category has been deleted.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Feed cannot be updated',
 			'internal_problem' => 'The newsfeed could not be added. <a href="%s">Check FreshRSS logs</a> for details. You can try force adding by appending <code>#force_feed</code> to the URL.',
 			'invalid_url' => 'URL <em>%s</em> is invalid',
-			'marked_read' => 'Feeds have been marked as read',
 			'n_actualized' => '%d feeds have been updated',
 			'n_entries_deleted' => '%d articles have been deleted',
 			'no_refresh' => 'There is no feed to refresh…',
diff --git a/app/i18n/en/index.php b/app/i18n/en/index.php
index 29dccc9ed..1c13abdb7 100644
--- a/app/i18n/en/index.php
+++ b/app/i18n/en/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Mark all as read',
 		'mark_cat_read' => 'Mark category as read',
 		'mark_feed_read' => 'Mark feed as read',
+		'mark_selection_unread' => 'Mark selection as unread',
 		'newer_first' => 'Newer first',
 		'non-starred' => 'Show non-favourites',
 		'normal_view' => 'Normal view',
diff --git a/app/i18n/es/feedback.php b/app/i18n/es/feedback.php
index 627c86afc..38548e901 100755
--- a/app/i18n/es/feedback.php
+++ b/app/i18n/es/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Actualización',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Se ha creado la categoría %s.',
 			'deleted' => 'Se ha eliminado la categoría.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'No es posible actualizar la fuente',
 			'internal_problem' => 'No ha sido posible agregar la fuente RSS. <a href="%s">Revisa el registro de FreshRSS </a> para más información.', // @todo
 			'invalid_url' => 'La URL <em>%s</em> es inválida',
-			'marked_read' => 'Fuentes marcadas como leídas',
 			'n_actualized' => 'Se han actualiado %d fuentes',
 			'n_entries_deleted' => 'Se han eliminado %d artículos',
 			'no_refresh' => 'No hay fuente a actualizar…',
diff --git a/app/i18n/es/index.php b/app/i18n/es/index.php
index 03054e23a..c88152459 100755
--- a/app/i18n/es/index.php
+++ b/app/i18n/es/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Marcar todo como leído',
 		'mark_cat_read' => 'Marcar categoría como leída',
 		'mark_feed_read' => 'Marcar fuente como leída',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Nuevos primero',
 		'non-starred' => 'Mostrar todos menos los favoritos',
 		'normal_view' => 'Vista normal',
diff --git a/app/i18n/fr/feedback.php b/app/i18n/fr/feedback.php
index 2443ad30a..dafdd353d 100644
--- a/app/i18n/fr/feedback.php
+++ b/app/i18n/fr/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Actualiser',
+		'articles' => array(
+			'marked_read' => 'Les articles sélectionnés ont été marqués comme lus.',
+			'marked_unread' => 'Les articles sélectionnés ont été marqués comme non-lus.',
+		),
 		'category' => array(
 			'created' => 'La catégorie %s a été créée.',
 			'deleted' => 'La catégorie a été supprimée.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Une erreur est survenue',
 			'internal_problem' => 'Le flux ne peut pas être ajouté. <a href="%s">Consulter les logs de FreshRSS</a> pour plus de détails. Vous pouvez essayer de forcer l’ajout par addition de <code>#force_feed</code> à l’URL.',
 			'invalid_url' => 'L’url <em>%s</em> est invalide.',
-			'marked_read' => 'Les flux ont été marqués comme lus.',
 			'n_actualized' => '%d flux ont été mis à jour.',
 			'n_entries_deleted' => '%d articles ont été supprimés.',
 			'no_refresh' => 'Il n’y a aucun flux à actualiser…',
diff --git a/app/i18n/fr/index.php b/app/i18n/fr/index.php
index 0a3a4abb3..bb0d14faf 100644
--- a/app/i18n/fr/index.php
+++ b/app/i18n/fr/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Tout marquer comme lu',
 		'mark_cat_read' => 'Marquer la catégorie comme lue',
 		'mark_feed_read' => 'Marquer le flux comme lu',
+		'mark_selection_unread' => 'Marquer la sélection comme non-lue',
 		'newer_first' => 'Plus récents en premier',
 		'non-starred' => 'Afficher les non-favoris',
 		'normal_view' => 'Vue normale',
@@ -52,7 +53,7 @@ return array(
 		'starred' => 'Afficher les favoris',
 		'stats' => 'Statistiques',
 		'subscription' => 'Gestion des abonnements',
-		'unread' => 'Afficher les non lus',
+		'unread' => 'Afficher les non-lus',
 	),
 	'share' => 'Partager',
 	'tag' => array(
diff --git a/app/i18n/he/feedback.php b/app/i18n/he/feedback.php
index 4b79b0d45..369714795 100644
--- a/app/i18n/he/feedback.php
+++ b/app/i18n/he/feedback.php
@@ -53,6 +53,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'מימוש',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Category %s has been created.', // @todo
 			'deleted' => 'Category has been deleted.', // @todo
@@ -75,7 +79,6 @@ return array(
 			'error' => 'Feed cannot be updated', // @todo
 			'internal_problem' => 'אין אפשרות להוסיף את ההזנה. <a href="%s">בדקו את הלוגים</a> לפרטים.', // @todo
 			'invalid_url' => 'URL <em>%s</em> אינו תקין',
-			'marked_read' => 'הזנות סומנו כנקראו',
 			'n_actualized' => '%d הזנות עודכנו',
 			'n_entries_deleted' => '%d המאמרים נמחקו',
 			'no_refresh' => 'אין הזנה שניתן לרענן…',
diff --git a/app/i18n/he/index.php b/app/i18n/he/index.php
index cef07eaf8..8ca6e76f7 100644
--- a/app/i18n/he/index.php
+++ b/app/i18n/he/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'סימון הכל כנקרא',
 		'mark_cat_read' => 'סימון קטגוריה כנקראה',
 		'mark_feed_read' => 'סימון הזנה כנקראה',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'חדשים בראש',
 		'non-starred' => 'הצגת הכל פרט למועדפים',
 		'normal_view' => 'תצוגה רגילה',
diff --git a/app/i18n/it/feedback.php b/app/i18n/it/feedback.php
index 934666aa5..b0f3a814a 100644
--- a/app/i18n/it/feedback.php
+++ b/app/i18n/it/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Aggiorna',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Categoria %s creata.',
 			'deleted' => 'Categoria cancellata',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Feed non aggiornato',
 			'internal_problem' => 'RSS feed non aggiunto. <a href="%s">Verifica i logs</a> per dettagli.', // @todo
 			'invalid_url' => 'URL <em>%s</em> non valido',
-			'marked_read' => 'Feeds segnati come letti',
 			'n_actualized' => '%d feeds aggiornati',
 			'n_entries_deleted' => '%d articoli cancellati',
 			'no_refresh' => 'Nessun aggiornamento disponibile…',
diff --git a/app/i18n/it/index.php b/app/i18n/it/index.php
index d79502c79..718093327 100644
--- a/app/i18n/it/index.php
+++ b/app/i18n/it/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Segna tutto come letto',
 		'mark_cat_read' => 'Segna la categoria come letta',
 		'mark_feed_read' => 'Segna il feed come letto',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Mostra prima i recenti',
 		'non-starred' => 'Escludi preferiti',
 		'normal_view' => 'Vista elenco',
diff --git a/app/i18n/kr/feedback.php b/app/i18n/kr/feedback.php
index ec2c812b9..12cd673ff 100644
--- a/app/i18n/kr/feedback.php
+++ b/app/i18n/kr/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => '피드를 가져오는 중입니다',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => '%s 카테고리가 생성되었습니다.',
 			'deleted' => '카테고리가 삭제되었습니다.',
@@ -74,7 +78,6 @@ return array(
 			'error' => '피드를 변경할 수 없습니다',
 			'internal_problem' => 'RSS 피드를 추가할 수 없습니다. 자세한 내용은 <a href="%s">FreshRSS 로그</a>를 참고하세요.',
 			'invalid_url' => 'URL (<em>%s</em>)이 유효하지 않습니다',
-			'marked_read' => '피드가 읽음으로 표시되었습니다',
 			'n_actualized' => '%d 개의 피드에서 새 글을 가져왔습니다',
 			'n_entries_deleted' => '%d 개의 글을 삭제했습니다',
 			'no_refresh' => '새 글을 가져올 피드가 없습니다…',
diff --git a/app/i18n/kr/index.php b/app/i18n/kr/index.php
index cc03f91c2..cb9684dff 100644
--- a/app/i18n/kr/index.php
+++ b/app/i18n/kr/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => '모두 읽음으로 표시',
 		'mark_cat_read' => '카테고리를 읽음으로 표시',
 		'mark_feed_read' => '피드를 읽음으로 표시',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => '최근 글 먼저',
 		'non-starred' => '즐겨찾기를 제외하고 표시',
 		'normal_view' => '일반 모드',
diff --git a/app/i18n/nl/feedback.php b/app/i18n/nl/feedback.php
index e73f2f7bd..756cfa9a2 100644
--- a/app/i18n/nl/feedback.php
+++ b/app/i18n/nl/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Actualiseren',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Categorie %s is gemaakt.',
 			'deleted' => 'Categorie is verwijderd.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Feed kan niet worden vernieuwd',
 			'internal_problem' => 'De feed kon niet worden toegevoegd. <a href="%s">Controleer de FreshRSS-logbestanden</a> voor details. Toevoegen forceren kan worden geprobeerd door <code>#force_feed</code> aan de URL toe te voegen.',
 			'invalid_url' => 'URL <em>%s</em> is ongeldig',
-			'marked_read' => 'Feeds zijn gemarkeerd als gelezen',
 			'n_actualized' => '%d feeds zijn vernieuwd',
 			'n_entries_deleted' => '%d artikelen zijn verwijderd',
 			'no_refresh' => 'Er is geen feed om te vernieuwen…',
diff --git a/app/i18n/nl/index.php b/app/i18n/nl/index.php
index e0184a0d0..7b81a00e2 100644
--- a/app/i18n/nl/index.php
+++ b/app/i18n/nl/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Markeer alles als gelezen',
 		'mark_cat_read' => 'Markeer categorie als gelezen',
 		'mark_feed_read' => 'Markeer feed als gelezen',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Nieuwste eerst',
 		'non-starred' => 'Laat alles zien behalve favorieten',
 		'normal_view' => 'Normale weergave',
diff --git a/app/i18n/pt-br/feedback.php b/app/i18n/pt-br/feedback.php
index 2057cf985..a2d66384e 100644
--- a/app/i18n/pt-br/feedback.php
+++ b/app/i18n/pt-br/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Atualizando',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Categoria %s foi criada.',
 			'deleted' => 'Categoria foi deletada.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'O feed não pode ser atualizado',
 			'internal_problem' => 'O RSS feed não pôde ser adicionado. <a href="%s">Verifique os FreshRSS logs</a> para detalhes.', // @todo
 			'invalid_url' => 'URL <em>%s</em> é inválida',
-			'marked_read' => 'Feeds foram marcados como lidos',
 			'n_actualized' => '%d feeds foram atualizados',
 			'n_entries_deleted' => '%d artigos foram deletados',
 			'no_refresh' => 'Não há feed para atualizar…',
diff --git a/app/i18n/pt-br/index.php b/app/i18n/pt-br/index.php
index 610f00840..2eff8d948 100644
--- a/app/i18n/pt-br/index.php
+++ b/app/i18n/pt-br/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Marcar todos como lidos',
 		'mark_cat_read' => 'Marcar categoria como lida',
 		'mark_feed_read' => 'Marcar feed com lido',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Novos primeiro',
 		'non-starred' => 'Mostrar todos, exceto favoritos',
 		'normal_view' => 'visualização normal',
diff --git a/app/i18n/ru/feedback.php b/app/i18n/ru/feedback.php
index 6d4e5e3fe..693a40b34 100644
--- a/app/i18n/ru/feedback.php
+++ b/app/i18n/ru/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Actualise',	//TODO
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Category %s has been created.',	//TODO
 			'deleted' => 'Category has been deleted.',	//TODO
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Feed cannot be updated',	//TODO
 			'internal_problem' => 'The newsfeed could not be added. <a href="%s">Check FreshRSS logs</a> for details. You can try force adding by appending <code>#force_feed</code> to the URL.',	//TODO
 			'invalid_url' => 'URL <em>%s</em> is invalid',	//TODO
-			'marked_read' => 'Feeds have been marked as read',	//TODO
 			'n_actualized' => '%d feeds have been updated',	//TODO
 			'n_entries_deleted' => '%d articles have been deleted',	//TODO
 			'no_refresh' => 'There is no feed to refresh…',	//TODO
diff --git a/app/i18n/ru/index.php b/app/i18n/ru/index.php
index eb6413e3c..9bb327786 100644
--- a/app/i18n/ru/index.php
+++ b/app/i18n/ru/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Mark all as read',
 		'mark_cat_read' => 'Mark category as read',
 		'mark_feed_read' => 'Mark feed as read',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Newer first',
 		'non-starred' => 'Show all but favorites',
 		'normal_view' => 'Normal view',
diff --git a/app/i18n/tr/feedback.php b/app/i18n/tr/feedback.php
index df7d1b264..278abe978 100644
--- a/app/i18n/tr/feedback.php
+++ b/app/i18n/tr/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => 'Güncelleme',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => 'Kategori %s oluşturuldu.',
 			'deleted' => 'Kategori silindi.',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'Akış güncellenemiyor',
 			'internal_problem' => 'RSS akışı eklenemiyor. Detaylar için <a href="%s">FreshRSS log kayıtlarını</a> kontrol edin.', // @todo
 			'invalid_url' => 'URL <em>%s</em> geçersiz',
-			'marked_read' => 'Akışlar okundu olarak işaretlendi',
 			'n_actualized' => '%d akışları güncellendi',
 			'n_entries_deleted' => '%d makaleleri silindi',
 			'no_refresh' => 'Yenilenecek akış yok…',
diff --git a/app/i18n/tr/index.php b/app/i18n/tr/index.php
index cb36d6717..1357c05e7 100644
--- a/app/i18n/tr/index.php
+++ b/app/i18n/tr/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => 'Hepsini okundu olarak işaretle',
 		'mark_cat_read' => 'Kategoriyi okundu olarak işaretle',
 		'mark_feed_read' => 'Akışı okundu olarak işaretle',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => 'Önce yeniler',
 		'non-starred' => 'Favori dışındakileri göster',
 		'normal_view' => 'Normal görünüm',
diff --git a/app/i18n/zh-cn/feedback.php b/app/i18n/zh-cn/feedback.php
index 1db879891..e9f7b4aac 100644
--- a/app/i18n/zh-cn/feedback.php
+++ b/app/i18n/zh-cn/feedback.php
@@ -52,6 +52,10 @@ return array(
 	),
 	'sub' => array(
 		'actualize' => '获取',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',	//TODO
+			'marked_unread' => 'The articles have been marked as unread.',	//TODO
+		),
 		'category' => array(
 			'created' => '分类 %s 已创建。',
 			'deleted' => '分类已删除。',
@@ -74,7 +78,6 @@ return array(
 			'error' => 'RSS 源更新失败',
 			'internal_problem' => 'RSS 源添加失败。<a href="%s">检查 FreshRSS 日志</a> 查看详情。', // @todo
 			'invalid_url' => 'URL <em>%s</em> 无效',
-			'marked_read' => 'RSS 源已被设为已读',
 			'n_actualized' => '%d 个 RSS 源已更新',
 			'n_entries_deleted' => '%d 篇文章已删除',
 			'no_refresh' => '没有可刷新的 RSS 源…',
diff --git a/app/i18n/zh-cn/index.php b/app/i18n/zh-cn/index.php
index 6729524f5..2b76961ef 100644
--- a/app/i18n/zh-cn/index.php
+++ b/app/i18n/zh-cn/index.php
@@ -40,6 +40,7 @@ return array(
 		'mark_all_read' => '全部设为已读',
 		'mark_cat_read' => '此分类设为已读',
 		'mark_feed_read' => '此源设为已读',
+		'mark_selection_unread' => 'Mark selection as unread',	//TODO
 		'newer_first' => '由新到旧',
 		'non-starred' => '显示未收藏',
 		'normal_view' => '普通视图',