LP 1189989: Add suspend option when placing hold

LP 1189989: Add suspend option when placing hold

Return of an option from JSPAC, the ability to immediately suspend a
hold when it's placed.

TODO: As noted in the code for editing a hold, a calendar selection
would be preferred to requiring users to enter a valid date manually.

This commit was a patch submitted by Bill Ott to Launchpad in August
2013.  Jason Stephenson applied the patch on April 22, 2017 and
resolved conflicts caused by the addition of a metarecords hold
feature in the TPAC.  The revised patch was committed with the
original author and commit timestamp.

Signed-off-by: Bill Ott <bott@grpl.org>
Signed-off-by: Jason Stephenson <jason@sigio.com>