Increase size of QR scanner area when Scanning

Right now, margins are enormous and it makes it more finnicky to center the QR code inside the indicated scan area. The challenge is not to align perfectly to the QR, but to get the QR anywhere inside the indicated scan area, so the bigger the scan area the better/easier for the user (should take up nearly the entire screen width with very marginal padding, and the same height to form a square).