Update Spanish translation

locales/es.json

@@ -361,7 +361,7 @@
     },
     "Fallback comments: ": "Comentarios alternativos: ",
     "Popular": "Populares",
-    "Search": "",
+    "Search": "Buscar",
     "Top": "Destacados",
     "About": "Acerca de",
     "Rating: ": "Valoración: ",
@@ -412,4 +412,4 @@
     "hdr": "",
     "filter": "",
     "Current version: ": "Versión actual: "
-}
+}