Without a matching entry in the record_sources table, the new
"Add to basket" option never appears in the Source filter dropdown
of the marc-overlay-rules admin page for module=source, since that
dropdown is populated from Koha::RecordSources, not the template's
label switch. Seed it in both the mandatory install-time data and
the upgrade atomicupdate, matching how batchimport/z3950/etc. were
introduced.
Also drop the unused say_warning import, route success messages
through say_success instead of a bare say, and simplify the
selectrow_array calls.
Signed-off-by: Martin Renvoize <martin.renvoize@openfifth.co.uk>
Signed-off-by: Pedro Amorim <pedro.amorim@openfifth.co.uk>
575e90f88f