change recheck to be age weighted

the number of rechecks against an item was artificially keeping things
at the top of the list well after the bug wasn't seen any more.
Change weighting to focus on age.

Also update the lp information on each bug deemed new enough so that
closed bugs are pushed further down the stack. In the future it would
be interesting to also weight based on importance.

Change-Id: Iaf76901725ddd89d3cea704c85da0d708c4b59b1
Reviewed-on: https://review.openstack.org/23324
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: James E. Blair <corvus@inaugust.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Tested-by: Jenkins
a more visually compact template for recheck

the recheck template was very expansive, which often meant that a
busy bug would take over the entire default window.

Instead of displaying things in <li>, make them lists on a single line.

Adjust whitespace on h3s so that they visually are attached to the
item they explain. Default h* spacing rules in html are actually
typically backwards, and require you to put a visual artifact above
them to imply the grouping you want.

Put a (closed) at the end of the title about bugs that are closed, to
give some indication about why they were shifted down the list.

It also deletes some errant trailing spaces, sorry about the unrelated
change there, but my emacs is configured to do that on every save.

Change-Id: I7869aa8a5b41f2f8826f61b8052933de659cb6cd
Reviewed-on: https://review.openstack.org/23341
Reviewed-by: James E. Blair <corvus@inaugust.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins