[x] Keep track of the list of meeting IDs, their titles, and last visit date, that this machine has visited. That list would be really handy, especially before but even with user accounts.
[ ] Also store user's name for that meeting (if nonempty), which overrides the existing global default name
[x] Could display this list (sorted by last visit date) when going to the front page of Comingle.
[ ] Option to delete some?
[ ] Possibly also a dropdown from the main Comingle icon.
(similar to https://github.com/edemaine/cocreate/issues/16)