Improve SQL for postgres compatibiltiy

Author: Phil E. Taylor

libraries/src/MVC/Model/ListModel.php

@@ -162,6 +162,8 @@ public function getisBlankSlate()
 			->clear('select')
 			->clear('values')
 			->clear('bounded')
+			->clear('limit')
+			->clear('order')
 			->clear('where')
 			->select('count(*)');