lightbox: use width for height for media card
lightbox: use width for height for media card

Something seems like it changed in label sizing where media card
is calculate all the lines it could need at a minimum width.

Probably good to do width for height here anyway.
https://phabricator.endlessm.com/T11000

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib