Bug 14354: Prevent edition of items from other branches if IndependentBranches is on

Bug 14354: Prevent edition of items from other branches if IndependentBranches is on

If IdependentBranches is ON, to edit/delete items from other branches
you need to be superlibrarian.
Currently a "simple" staff user cannot edit them from the edit item page
but from the catalogue detail page.

The edit links should not be displayed on this table.

Test plan:
O/ Set IndependentBranches to "Prevent".
Create a record and add 2 items:
   Set homebranch to L1 for item I1.
   Set homebranch to L2 for item I2.
1/ With a superlibrarian user, you should be able to edit both items.
2/ With a "simple" user attached to L1, you should only be able to edit
I1. The edit links should not be displayed for I2.

Note that the checkbox is displayed on the catalogue detail page (item
list), but on the batch tools, it won't be possible to select non-modifiable
items.

TODO: Add a server-side check. Indeed it is still possible to edit an
item if the user know the url.

Followed test plan. Works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit bcab2416399e93f5ce9b1083395c052046d5d02a)
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>