Preferences and login modes done

Well, as always, almost done. A few things don't update when they should, but it's generally working.

Looking at the early inline todo list,

/*
Todo:
* Work with public directories
* Get the rest of the list stuff
* Cookies
* UI
*/

Cookies are implemented, the UI was modified, public, private, and shared directories work.

It's coming together, but there are still a few things missing.