render_tag -> tag: phabricator_render_form -> phabricator_form

Summary: Convert most phabricator_render_form callsites. In the case of the "headsup view", it converts it by deleting the element entirely (this is the very old Maniphest/Differential header which we no longer use).

Test Plan: Poked around a bit.

Reviewers: vrana

Reviewed By: vrana

CC: aran

Maniphest Tasks: T2432

Differential Revision: https://secure.phabricator.com/D4726

src/applications/auth/controller/PhabricatorMustVerifyEmailController.php

@@ -51,7 +51,7 @@ final class PhabricatorMustVerifyEmailController
       '</p>');
     $error_view->appendChild(
       '<div class="aphront-failure-continue">'.
-        phabricator_render_form(
+        phabricator_form(
           $user,
           array(
             'action' => '/login/mustverify/',