Bug 36182: Add booksellerid columns to holdings table

Bug 36182: Add booksellerid columns to holdings table

1) Apply patch, reset_all
2) Configure holdings_table, visit:
<staff_url>/cgi-bin/koha/admin/columns_settings.pl?module=catalogue&page=detail&table=holdings_table
3) Confirm holdings_booksellerid is there and is hidden by default
4) Visit a record:
<staff_url>/cgi-bin/koha/catalogue/detail.pl?biblionumber=76
5) Edit one of the items and add a value to field 'e' Source of acquisition
5.5) You may need to click the 'show filters' link in order to have the 'Columns' table button show up
6) Go back to the record and click on the 'Columns' above the table
7) Click 'Source of acquisition'. Confirm it shows as expected

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>