en to es_MX translation catalogue (3 entries)

note: translators: %s: Name of the file that failed to upload.
en: &#8220;%s&#8221; has failed to upload.
es_MX: Ha habido un error al subir &#8220;%s&#8221;

en: Dismiss
es_MX: Descartar

en: The file size has exceeded the maximum file size setting.
es_MX: El fichero supera el tamaño de archivo máximo establecido.
