Modernize Releeph branch edit and create interfaces

Summary: Ref T3092. Fixes T3724. Use modern/flexible UI for these interfaces. Removes the ability to retarget an existing branch (you can just close it and open a new one if you made a mistake).

Test Plan: {F54437} {F54438}

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3092, T3724

Differential Revision: https://secure.phabricator.com/D6765

src/applications/releeph/controller/branch/ReleephBranchViewController.php

@@ -76,17 +76,8 @@ final class ReleephBranchViewController extends ReleephProjectController
 
   public function buildApplicationCrumbs() {
     $releeph_branch = $this->getReleephBranch();
-    $releeph_project = $this->getReleephProject();
 
-    $crumbs = parent::buildApplicationCrumbs()
-      ->addCrumb(
-        id(new PhabricatorCrumbView())
-          ->setName($releeph_project->getName())
-          ->setHref($releeph_project->getURI()))
-      ->addCrumb(
-        id(new PhabricatorCrumbView())
-          ->setName($releeph_branch->getDisplayNameWithDetail())
-          ->setHref($releeph_branch->getURI()));
+    $crumbs = parent::buildApplicationCrumbs();
 
     if ($releeph_branch->isActive()) {
       $create_uri = $releeph_branch->getURI('request/');