Bug 5949: Hide 'Edit record' link when creating new order

Bug 5949: Hide 'Edit record' link when creating new order

The 'Edit record' link only makes sense, when you want to modify
an order after creating it. Before there is no biblionumber the link
can link to. Patch adds check for existing biblionumber so link is
only shown when there is an existing record to be edited.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
(cherry picked from commit 760babcf4c7573620cf3e03c0e0899282b6634b1)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>