Added German translation for the settings view (#478)

* added translation for the settings view

* added translation for the settings view

mobile/assets/i18n/de-DE.json

@@ -48,7 +48,7 @@
   "control_bottom_app_bar_delete": "Löschen",
   "create_shared_album_page_share": "Teilen",
   "create_shared_album_page_create": "Erstellen",
-  "create_shared_album_page_share_add_assets": "ELEMENTE HINZUFÜGEN",
+  "create_shared_album_page_share_add_assets": "FOTOS HINZUFÜGEN",
   "create_shared_album_page_share_select_photos": "Fotos auswählen",
   "daily_title_text_date": "E, dd MMM",
   "daily_title_text_date_year": "E, dd MMM, yyyy",
@@ -76,6 +76,7 @@
   "monthly_title_text_date_format": "MMMM y",
   "profile_drawer_client_server_up_to_date": "App und Server sind aktuell",
   "profile_drawer_sign_out": "Abmelden",
+  "profile_drawer_settings": "Einstellungen",
   "search_bar_hint": "Durchsuche deine Fotos",
   "search_page_no_objects": "Keine Objektinformationen verfügbar",
   "search_page_no_places": "Keine Informationen über Orte verfügbar",
@@ -112,5 +113,14 @@
   "library_page_new_album": "Neues Album",
   "create_album_page_untitled": "Unbenannt",
   "share_dialog_preparing": "Vorbereiten...",
-  "control_bottom_app_bar_share": "Teilen"
+  "control_bottom_app_bar_share": "Teilen",
+  "setting_pages_app_bar_settings": "Einstellungen",
+  "theme_setting_theme_title": "Theme",
+  "theme_setting_theme_subtitle": "Wählen Sie die Themeneinstellung der App",
+  "theme_setting_system_theme_switch": "Automatisch (Systemeinstellung folgen)",
+  "theme_setting_dark_mode_switch": "Dunkler Modus",
+  "theme_setting_image_viewer_quality_title": "Qualität des Bildbetrachters",
+  "theme_setting_image_viewer_quality_subtitle": "Einstellen der Qualität des Detailbildbetrachters",
+  "theme_setting_three_stage_loading_title": "Dreistufiges Laden aktivieren",
+  "theme_setting_three_stage_loading_subtitle": "Das dreistufige Ladeverfahren liefert die beste Bildqualität, ist dafür aber langsamer beim Laden."
 }