Steps to reproduce the issue

1. Go to /administrator/index.php?option=com_banners&view=clients
2. Shrink the window below md breakpoint

Expected result

Additional informations in the table are hidden.

Actual result

In the table, additional informations about rows are hidden but the header is still shown

System information (as much as possible)

Additional comments

"d-none" class is ineffective in the header because display property is overridden by "d-md-table-cell".