Use getBestURI() to set file handle URIs

Summary: getBestURI() = best URI

Test Plan:
It says "best" in the name so it must be the best!

Also in Maniphest emails we'll link you to /view/ even for binaries and other
non-viewable content.

Reviewers: btrahan, jungejason

Reviewed By: btrahan

CC: anjali, aran

Differential Revision: https://secure.phabricator.com/D1461

src/applications/phid/handle/data/PhabricatorObjectHandleData.php

@@ -326,7 +326,7 @@ class PhabricatorObjectHandleData {
             } else {
               $file = $files[$phid];
               $handle->setName($file->getName());
-              $handle->setURI($file->getViewURI());
+              $handle->setURI($file->getBestURI());
               $handle->setComplete(true);
             }
             $handles[$phid] = $handle;