This idea would be very helpful for people who are wanting to keep pictures deleted for space purposes, and keeping backup time down.

You (Textra) already show the number of media (pictures) for a contact session by going into that dialogue and going to the "medial" option. Though that is helpful in itself it would be much more convenient if when looking at the list of contacts with text sessions the number of pictures would show up there. Then one could see who has media to be deleted at a glance just by scrolling through the list and not have to open each dialogue session.