After a file upload, take the user to the info page, not the view page

Summary: Fixes T5588. If you upload an image, we currently take you to the image URL, but this makes it hard to figure out the monogram for use elsewhere.

Test Plan: Uploaded a file and was taken to the info page.

Reviewers: joshuaspence

Reviewed By: joshuaspence

Subscribers: epriestley

Maniphest Tasks: T5588

Differential Revision: https://secure.phabricator.com/D9872