Page: https://release.k8s.p4.greenpeace.org/international/story/20131/test/

Description of the issue: Images are not adjusting for image height when
using the Grid Style.

e.g.
Page:
https://release.k8s.p4.greenpeace.org/international/three-demos-of-the-new-gallery-block/
Post:
https://release.k8s.p4.greenpeace.org/international/story/20131/test/

likely related to https://jira.greenpeace.org/browse/PLANET-2435

Attachments:
https://drive.google.com/open?id=1-48K4NF5spyKDeEOedHIPvyhnU06LotD,
https://drive.google.com/open?id=1egLcWcAKn12lHGnX7gTpY6RdvxljAvaU

Acceptance criteria:

• Portrait images to be cropped on top and bottom