Activate the new Repository creation workflow

Summary:
Ref T2231. This:

  - Activates the new multi-step workflow, and exposes it in the UI.
  - Adds "can create", "default view" and "default edit" capabilities.
  - Provides a default value for `repository.default-local-path` and forces repositories into it by default. It's still editable, but Phabricator gets it correct (for some definition of correct) by default now.

Test Plan: Created some new repositories with the new workflow.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1286, T2231

Differential Revision: https://secure.phabricator.com/D7413

src/applications/diffusion/controller/DiffusionRepositoryEditMainController.php

@@ -336,12 +336,12 @@ final class DiffusionRepositoryEditMainController
     $view->addProperty(pht('Default Branch'), $default_branch);
 
     $track_only = nonempty(
-      $repository->getHumanReadableDetail('branch-filter'),
+      $repository->getHumanReadableDetail('branch-filter', array()),
       phutil_tag('em', array(), pht('Track All Branches')));
     $view->addProperty(pht('Track Only'), $track_only);
 
     $autoclose_only = nonempty(
-      $repository->getHumanReadableDetail('close-commits-filter'),
+      $repository->getHumanReadableDetail('close-commits-filter', array()),
       phutil_tag('em', array(), pht('Autoclose On All Branches')));
     $view->addProperty(pht('Autoclose Only'), $autoclose_only);