Fix dynamic string usage as safe input

Test Plan:
  $ arc lint

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4796
Return applications in application order

Summary:
By default, order applications in application order. See discussion in D4708.

Principally, this is intended to make sure that application event handlers are registered in order, and thus fire in order.

Test Plan:
Looked at /applications/, homepage tiles, verified they both still work.

I didn't actually test the event handler bit since it's fairly complicated to test blind; D4708 should provide a test case.

Reviewers: btrahan, Afaque_Hussain

Reviewed By: Afaque_Hussain

CC: aran

Differential Revision: https://secure.phabricator.com/D4791
Allow `PhabricatorMenuView` to have items inserted in the middle

Summary:
Make `PhabricatorMenuView` more flexible, so callers can add items to the beginning/end/middle.

In particular, this allows event handlers to receive a $menu and call `addMenuItemToLabel('activity', ...)` or similar, for D4708.

Test Plan: Unit tests. Browsed site. Home page, Conpherence, and other pages with menus look correct.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D4792
Minor, fix loged out pages.
Merge remote-tracking branch 'upstream/master'