Show image dimensions and some other metadata in Differential
Summary: Fixes T2101. When viewing an image change, show image dimensions, MIME type, and filesize.
Test Plan:
{F190189}
{F190190}
very utility
such wow
Reviewers: mailson, btrahan, chad
Reviewed By: chad
Subscribers: epriestley, Korvin, aran
Maniphest Tasks: T2101
Differential Revision: https://secure.phabricator.com/D5206