You can now filter templates by date last changed (Fig 1: 1) or date last sent (including never; Fig 1: 2) as well as the existing filters by type, name, audience and tags.

You can also now sort the list of templates by date last sent (Fig 1: 3) in addition to template name and date last changed.

Fig 1: filter templates by date changed (1) and date last sent (2) including never, as illustrated, and sort by date last sent (3)