Allow users to set whether or not textareas are monospaced.

Summary:
Some users like monospaced textareas and others don't.
This introduces an option to set this as a user preference.

Test Plan: Enabled and saw monospaced textareas, disabled and saw non-monospaced textareas.

Reviewers: epriestley

CC: aran, Korvin

Maniphest Tasks: T2114

Differential Revision: https://secure.phabricator.com/D4037

src/applications/pholio/controller/PholioMockEditController.php

@@ -193,7 +193,8 @@ final class PholioMockEditController extends PholioController {
         id(new PhabricatorRemarkupControl())
           ->setName('description')
           ->setValue($v_desc)
-          ->setLabel(pht('Description')))
+          ->setLabel(pht('Description'))
+          ->setUser($user))
       ->appendChild(
         id(new AphrontFormDragAndDropUploadControl($request))
           ->setName('file_phids')