Refactor all calls of p::clean() to SafeString::of() and p::purify() to SafeString::purify().

Removing any p::clean() calls for arguments to t() and t2() since their args are wrapped in a SafeString anyway.

modules/gallery/views/admin_maintenance.html.php

@@ -90,7 +90,7 @@
           <?= $task->status ?>
         </td>
         <td>
-          <?= p::clean($task->owner()->name) ?>
+          <?= SafeString::of($task->owner()->name) ?>
         </td>
         <td>
           <? if ($task->state == "stalled"): ?>