OPIN Stage pictures in tiles are not sharp

[hello-kathi]

URL: https://opin-stage.liqd.net/en/help/
user: Admin
expected behaviour: Pictures are not sharp in the tiles even though they are big enaough
behaviour:
important screensize:
device & browser:
Comment/Question:
Is there a thing the admin can do?
Screenshot?

[philli-m]

NOTE: this is due to wagtail image tag, we currently use a icon image quality ratio, need to increase for photos

a4-opin/home/templates/home/manuals_index.html

Line 19 in b989650

{% image subpage.image max-220x220 as image %}