Bug 21145: Do not show buttons for datatables on opac detail page

Bug 21145: Do not show buttons for datatables on opac detail page

Test plan:
0) Do not apply the patch
1) Go to opac detail page
2) There are up to three datatables
    - items
    - items from other branches (only if there are any and the OpacSeparateHoldings preference is set)
    - subscriptions
3) try to find record with all three tables and confirm, there is button
"Columns visibility" above the table
4) Apply the patch
5) Repeat 1-3 and confirm the button is no more here

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>