BoothWall v3.0.3

Changed

• The wall's repo card (wall.source) is quieter: the repo's name beside the host's mark, which no longer cuts it off, and a bigger QR beside "Open source", why to scan and the license, in smaller type so it doesn't compete with the photos.
• The social preview image names the repo at github.com/boothwall/boothwall-oss.