When we reach the share limit (currently 1000) we need to revoke some of those who have access, you know old stuff gone.

Today the list seems kind of random.

It would be nice to have it sortable. Here are some examples of useful sort criteria:
- by distance (even if not shown);
- by last message received timestamp;
- by last time user has been online (to get rid of abandoned accounts);
- by last share timestamp.

For sure there are some other useful sorting criteria.

Everything else (revoking access individually for instance) can remain the same. We only need to bring some order to the chaos.