Fix file upload redirect URI

Summary: Ref T2625. This is now "query" instead of "filter" with the new search stuff.

Test Plan: Uploaded a file. Grepped for 'file/filter'.

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T2625

Differential Revision: https://secure.phabricator.com/D6105