Add support in OnAir2 for another additional image (to support a landscape image instead of just a square one).
(Reported by @mariangela)
{F1452805}
This means:
[] add backend support for an additional field for the post type "Show" called "landscape image"
[] display that image in the frontend
== Frontend part ==
(Insert here mockup)
== Backend part ==
{F1473564}