Add ability to name saved queries.

Summary: Can name saved queries.

Test Plan: Try naming some saved queries using the form.

Reviewers: epriestley

CC: aran, Korvin, AnhNhan

Maniphest Tasks: T2625

Differential Revision: https://secure.phabricator.com/D5878

Conflicts:

	src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php