Show wait delay in daemon UI explicitly

Summary: Ref T3557. I had misremembered this value; show it in the UI. Depends on D6542.

Test Plan: Viewed UI for a waiting daemon. Saw it restart after 5s.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3557

Differential Revision: https://secure.phabricator.com/D6543