Option to disable wave suggestions as a *user*

The "Wave to say hi!" boxes take up a lot of space in text channels. An option was added to disable them for *servers*, but this option should really be at the user-level, so I can disable the box suggesting them on every server I'm a part of without having to beg server admins.

The box triples the amount of vertical space taken up by each new user, compared with having it disabled. It's a lot of visual clutter.