Sort out application crumbs in new repository edit workflow

Summary: Ref T2231. Crumbs in the Diffusion edit workflow are a bit wonky, with stuff like "rP (master)" which isn't very useful and no link back to the main "Edit" page. Make them consistent across all the screens.

Test Plan: Loaded a bunch of these screens and saw sane crumbs on all of them.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2231

Differential Revision: https://secure.phabricator.com/D7407

src/applications/diffusion/controller/DiffusionRepositoryCreateController.php

@@ -1,6 +1,7 @@
 <?php
 
-final class DiffusionRepositoryCreateController extends DiffusionController {
+final class DiffusionRepositoryCreateController
+  extends DiffusionRepositoryEditController {
 
   private $edit;
   private $repository;
@@ -131,7 +132,7 @@ final class DiffusionRepositoryCreateController extends DiffusionController {
       $form->readFromObject($dict);
     }
 
-    $crumbs = $this->buildCrumbs();
+    $crumbs = $this->buildApplicationCrumbs();
     $crumbs->addCrumb(
       id(new PhabricatorCrumbView())
         ->setName($title));