Fix fatal on project boards with no tasks

Summary: Ref T1344. We try to do a bad edge query with no sources right now if there are no tasks in a project.

Test Plan:
  - Hit exception, applied patch, no exception.
  - Other boards still have tasks.

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T1344

Differential Revision: https://secure.phabricator.com/D7951
Fix exception for new error stuff in Conduit

Summary: This might be `null`.

Test Plan: Loaded, got exception, applied patch, no exception. Viewed a method with an actual message too, that also worked.

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D7955
Fix Herald field type error

Summary: See IRC. This is a likely fix for @DctrWatson's error: we're returning `null` but should return `array()` to indicate no values.

Test Plan: Will make @DctrWatson do it.

Reviewers: btrahan

Reviewed By: btrahan

CC: dctrwatson, aran

Differential Revision: https://secure.phabricator.com/D7950
Add dependencies to releeph

Summary: Add the 'Depends On' field to releeph requests. This will help the release engineers to be aware of the dependencies and make sure pick them altogether.

Test Plan: Check sandbox. This field shows up when a revision has some dependencies.

Reviewers: JoelB, lifeihuang, epriestley, #blessed_reviewers

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7946
Shorten Jump Nav box to more standard size

Summary: just a little nip/tuck, facebook will surely rejoice.

Test Plan: reload html, see new css

Reviewers: epriestley

Reviewed By: epriestley

CC: Korvin, epriestley, aran

Differential Revision: https://secure.phabricator.com/D7956
Merge remote-tracking branch 'upstream/master' into release