Bug 25335: group by authorised_value in addbiblio.pl

To Test:
1- Edit your default framework, connect any subfield outside of the 952 to an authorised value (for example, connect the 942$n to the Yes_No auth value)
2 - Find a record in that framework
3 - Edit the record and find your subfield
4 - The subfield shows a dropdown with no contents
5 - check plack log, see "DBD::mysql::st execute failed: 'koha_kohadev.authorised_values.authorised_value' isn't in GROUP BY "
6 - apply patch, restart all
7 - reload edit record page, see your auth value dropdown has contents

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

cataloguing/addbiblio.pl

@@ -484,7 +484,7 @@ sub build_tabs {
     $query .= qq{ LEFT JOIN authorised_values_branches ON ( id = av_id )} if $branch_limit;
     $query .= " WHERE category = ?";
     $query .= " AND ( branchcode = ? OR branchcode IS NULL )" if $branch_limit;
-    $query .= " GROUP BY lib ORDER BY lib, lib_opac";
+    $query .= " GROUP BY authorised_value,lib ORDER BY lib, lib_opac";
     my $authorised_values_sth = $dbh->prepare( $query );
 
     # in this array, we will push all the 10 tabs