2.31.0 and 2.32.0: approve a visual change with one click, shorter maintenance mode

Approve a visual change with one click (2.31.0). When a theme or page-builder update changes only how pages look, and every other check passes, Verploy no longer simply holds it back. It shows the before-and-after screenshots side by side with one button, “Looks good, go live”, which puts that update live through the normal safe route: backup first, checked after.

Maintenance mode only while installing (2.32.0). On sites with the data guard, which keeps orders and form entries made during an update, the backup is now taken before maintenance mode starts, and the full check after going live runs on the public site. Visitors see the maintenance notice only during the switch itself, not during the backup and the full check as well.

Small fixes. Free disk space in the pre-check is shown in GB instead of MB, and a visual change you approved no longer counts as an earlier failure for that site.