It's not possible to set attrs of table>thead>tr in Style

[berycz]

<tr> in table_header_rows.html don't have any {{ headers.tr.attrs }}
the only way now to set classes to those is by overriding the whole template

(btw this issue is not at all high priority to me)

[berycz]

same for row_group.html I guess

[berycz]

Also in header.html I'd like to be able to set classes for links (<a>)

[boxed]

#582 for the thead conf