Pontoon: Update Spanish (es-ES) localization of Test Pilot Website
Pontoon: Update Spanish (es-ES) localization of Test Pilot Website

Localization authors:
- jlgetxo <jlgetxo@gmail.com>

chuckharmston/testpilot,fzzzy/testpilot,mathjazz/testpilot,mathjazz/testpilot,meandavejustice/testpilot,mozilla/idea-town,mozilla/idea-town-server,6a68/idea-town,lmorchard/testpilot,mozilla/idea-town,mozilla/idea-town-server,6a68/testpilot,mozilla/idea-town-server,6a68/idea-town,flodolo/testpilot,lmorchard/testpilot,dannycoates/testpilot,dannycoates/testpilot,chuckharmston/testpilot,lmorchard/idea-town-server,meandavejustice/testpilot,6a68/idea-town,lmorchard/idea-town-server,dannycoates/testpilot,mozilla/idea-town-server,lmorchard/testpilot,lmorchard/testpilot,chuckharmston/testpilot,lmorchard/idea-town-server,lmorchard/idea-town,lmorchard/idea-town,6a68/testpilot,lmorchard/idea-town-server,flodolo/testpilot,fzzzy/testpilot,flodolo/testpilot,mozilla/idea-town,fzzzy/testpilot,mozilla/idea-town,mathjazz/testpilot,chuckharmston/testpilot,meandavejustice/testpilot,6a68/idea-town,fzzzy/testpilot,6a68/testpilot,mathjazz/testpilot,flodolo/testpilot,lmorchard/idea-town,dannycoates/testpilot,6a68/testpilot,lmorchard/idea-town,meandavejustice/testpilot