Bug 6512: time missing from item circulation history

Bug 6512: time missing from item circulation history

Re-enables the display of the seentime in circ/bookcount.tt; a DEFAULT was set, but
the value was never actually called into the template.

This patch also moves the time to the right side of the date, and removes the ??:?? default,
because otherwise, it's just silly

Signed-off-by: Ian Walls <ian.walls@bywatersolutions.com>
Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>