Bug 29671: Dropbox mode is unchecked after check in confirm on item with Materials...

Bug 29671: Dropbox mode is unchecked after check in confirm on item with Materials specified

Suggested patch

steps to reproduce :

1) Enable System preference CirConfirmItemParts
2) Go to Circulation > Check in
3) Enable Dropbox mode (Book drop mode) in the Checkin settings
4) Enter a barcode of an item having the 'Materials specified' field
   not empty
5) A Popup is shown, click the confirm button
6) The Dropbox mode (Book drop mode) is now unchecked, but should stay
   checked.

In the template, the modal window lacks the dropboxmode input, so that
it stays on the next page. I attached a patch with my suggested correction.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Géraud <geraud.frappier@inlibro.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>