LP#1312699 - Add feature to allow user to edit their checkout history.

LP#1312699 - Add feature to allow user to edit their checkout history.

In the checkout history page, a new column and action selector is provided to allow
the paton to indicate items they would just as soon not want to see again in the
history list for whatever reason.  NOTE: This is not a PURGE function; it simply
suppresses display of items in the history list (and exported history files).
Internally, the circulations are kept by Evergreen for several reasons which are
not affected by this functionality.

Signed-off-by: Dan Pearl <dpearl@cwmars.org>