[forum software] too easy to accidentally unfollow multiple topics

that "X" button on this toolbar looks too much like a "close" button. if you've got several items selected, and decide not to do anything, you might be tempted to click "X" to dismiss this hovering panel. turns out that's the "unfollow topic" button, which i didn't see in the tooltip until it was too late. also there's no "undo".

please change this icon; or at least add a confirmation dialog, or better yet, an undo.