Forum site feedback - marking categories as read

On other web forums I visit, that look very much the same as this one, I can mark a whole category of discussion as read simply by clicking on the icon to the left of the category. So in our case here, it would be the FreeBSD daemon/beastie orb icon. However that does not work on this forum, at least not on my machine.

Is that something that can be enabled? I could not find in my profile a feature setting for me to enable.
 
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