A Discourse theme component to change avatars size on posts, on header and on /latest and their shape (from rounded to square). See https://meta.discourse.org/t/how-to-increase-avatars-size-on-posts-without-making-them-blurred/82214 and https://meta.discourse.org/t/how-to-increase-avatars-size-on-latest-without-making-them-blurred/89606.