m todo + autocollapse all fully read branches when creating tree

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add keys for jumping between unread leaves

Signed-off-by: Mattias Andrée <maandree@operamail.com>
m

Signed-off-by: Mattias Andrée <maandree@operamail.com>