Read all button on homepage

When we moved to branded templates, the thing our superusers missed the most (after the unread/read confusion) was the option to change the entire forum to 'read'.

We have the 'mark this forum as read' option on each board but for our superusers - who typically have a few specialist boards they follow and ignore the rest based on their specialty, they find that time consuming and tedious.

Any chance we can have the option back on the homepage?