LP1975879 Holdings editor allows owning lib changed

LP1975879 Holdings editor allows owning lib changed

A new edit (pencil) icon appears to the left of the first call number
field in the 'holdings' tab of the copy edit.  When clicked, the user has
a chance to enter a new org unit value to act as the owning lib of the
affected call number.

If the "Change Circ Lib When Owning Lib Changes" preference is set, then
any copies linked to the affected call number within the current edit
session will have their circ libs updated to match the new owning lib of
the call number.

Signed-off-by: Bill Erickson <berickxx@gmail.com>