In addition to what we did here https://github.com/ezsystems/ezpublish-legacy/pull/1351
We need to allow sorting by "trashed" in the trash view (content/trash/).

To do so we had to update the ezpublish_legacy/kernel/classes/ezcontentobjecttreenode.php
with the following code after case 'name': (line 651)

case 'trashed':
{
  $sortingFields .= 'trashed';
} break;