Add singular row translation

Author: cdanielzt

resources/lang/es.json

@@ -19,6 +19,7 @@
     "of": "de",
     "Reorder": "Reordenar",
     "results": "resultados",
+    "row": "fila",
     "rows": "filas",
     "rows, do you want to select all": "filas, desea seleccionar todas",
     "No items found. Try to broaden your search.": "No se encontraron elementos. Intente ampliar la búsqueda.",