Adjust the font size of the 'No thumbnails available' text.

(cherry picked from commit c4dfed0)

Author: DanGastardelli

src/app/thumbnail/thumbnail.component.scss

@@ -34,6 +34,7 @@ img {
       justify-content: center;
       align-items: center;
       text-align: center;
+      font-size: 14px;
     }
   }
 }