also make nav go backward when clicking the account switch button if we
already are navigating to accounts
Signed-off-by: William Casarin <jb55@jb55.com>
Another massive refactor to change the way routing works. Now any
column can route anywhere.
Also things are generally just much better and more modular via the
new struct split borrowing technique.
I didn't even try to split this into smaller commits for my sanity.
Signed-off-by: William Casarin <jb55@jb55.com>
