list table header height not consistent on bulkActionButtons={false}

[esistgut]

Without bulkActionButtons={false}:

With bulkActionButtons={false}:

On previous versions it remained consistent:

[esistgut]

The issue report was initially focused on the header only but as you can see from the previous screenshots something is wrong about the height on the actual rows too. This is visible on the demo too: #3437 (comment)

[djhi]

Thanks a lot for testing this 👍

[fzaninotto]

Fixed by #3480