add persistent user preferences and GUI for them+discussion

not sure we can do markup as a user preference. see add user-selectable markup options+discussion.

if there really is a good case for preferences (probably), I suspect we'll want to integrate it with sets, not just indiv cards.

Totally on-board with using sets where relevant. Maintaining open/closed state is always a specific card, and I'm thinking should probably be even more specific, i.e. card X when included in card Y, which would make for unwieldy card names via sets but we could do it, something like: "_user+Menu+*self+*included_in+*sidebar+*self+*openclosed" ?

  --John Abbe.....Mon Aug 30 14:26:38 -0700 2010