Provide convenience method addTextCrumb() to PhabricatorCrumbsView

Summary: We currently have a lot of calls to `addCrumb(id(new PhabricatorCrumbView())->...)` which can be expressed much more simply with a convenience method. Nearly all crumbs are only textual.

Test Plan:
  - This was mostly automated, then I cleaned up a few unusual sites manually.
  - Bunch of grep / randomly clicking around.

Reviewers: btrahan, chad

Reviewed By: btrahan

CC: hach-que, aran

Differential Revision: https://secure.phabricator.com/D7787

src/applications/phragment/controller/PhragmentSnapshotViewController.php

@@ -40,9 +40,7 @@ final class PhragmentSnapshotViewController extends PhragmentController {
     }
 
     $crumbs = $this->buildApplicationCrumbsWithPath($parents);
-    $crumbs->addCrumb(
-      id(new PhabricatorCrumbView())
-        ->setName(pht('"%s" Snapshot', $snapshot->getName())));
+    $crumbs->addTextCrumb(pht('"%s" Snapshot', $snapshot->getName()));
 
     $children = id(new PhragmentSnapshotChildQuery())
       ->setViewer($viewer)