R1:4e8e035de006

Show detailed ApplicationTransaction changes in a dialog

Summary: Fixes T4423. This works better and is simpler and more flexible.

Test Plan: Clicked "(Show Details)", got a popup with the details.

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Maniphest Tasks: T4423

Differential Revision: https://secure.phabricator.com/D8227