Stop using Pagination() and instead use $theme->pager() in views.

Move the pager() function up to Gallery_View and replace
themes/admin_wind/views/pager.html.php (Pagination based) with a
modified version from the wind theme in
themes/admin_wind/views/paginator.html.php.  Fixes #1718.

modules/user/views/admin_users.html.php

@@ -110,7 +110,7 @@
         </table>
 
         <div class="g-paginator">
-          <?= $pager ?>
+          <?= $theme->paginator() ?>
         </div>
 
       </div>