Clear table after fetch from server

Clears the table of stories when fetching a new list of stories. This
seems a bit drastic, but it ensures that the state icons are updated
as well (instead of just the titles).
Show story data next to backlog
Handle task interaction like story interaction

When moving or adding tasks, instead of waiting for the user to
reselect the task reload the task each time.
Make certain items seem more clickable
Use closure-templates