Recall memories.

Summary: Be able to recall memories by tapping on them.

Test Plan:
- Recalled existing memories.
- Added a new memory, flipped to a former memory, recalled the new one.

Reviewers: jcarter, cegeland

Reviewed By: jcarter

Maniphest Tasks: T66

Differential Revision: https://phabricator.edgesysdesign.com/D80