Multiple updates.

src/config/default-app-config.ts

@@ -207,7 +207,7 @@ export class DefaultAppConfig implements AppConfig {
     // The absolute lowest year to display in the dropdown (only used when no lowest date can be found for all items)
     defaultLowerLimit: 1900,
     // Whether to add item thumbnail images to BOTH browse and search result lists.
-    showItemThumbnails: true
+    showThumbnails: true
   };
 
   // Item Config