hanky code enforcement

I keep forgetting there's no avatar preview when editing your profile....
..... do I just try whipping up a preview tool so I can double check the centering/look of an avatar without having to upload it beforehand

EDIT: there's supposed to be one but it's Borked it seems. Will still do it because it'd be useful just for seeing how an avatar looks like at smaller sizes + it'd be funny.

or did someone make a tool like that already? Surely someone did, right?

It's here and it does what it says on the tin

And the source is available at https://github.com/eramdam/cohost-avatar-previewer