Use modern UI elements and application/event-oriented construction in Projects

Summary:
Ref T2715. This partially modernizes projects.

Precursor to using ApplicationSearch, which is a precursor to using application PHIDs.

Then, some day, we will make projects good.

Test Plan: {F51126}

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T2715

Differential Revision: https://secure.phabricator.com/D6524