You can click the blue boxes to filter the list of notifications. Once
the notifications have gone there’s nothing to filter, so we should just
show the numbers but without them being clickable.
completely mimicks the job status page, and as such, all the code and
templates have been taken from the job page. This page performs
exactly the same as the job page for now
* total, sending, delivered, failed blue boxes (though they'll just
read 0/1 for now.
* download report button (same as with job download, except without job
or row number in file)
* removed references to scheduled
* kept references to help (aka tour/tutorial) as that'll eventually
change over from a job to a one-off too
