feat(lobby/prejoin/native): style updates (#12615)

Bumped to catch old macOS versions which were not signed and thus did
not have autoupdater working (ie. everything older than
https://github.com/jitsi/jitsi-meet-electron/releases/tag/v2021.11.2)

Signed-off-by: Christoph Settgast <csett86@web.de>

Detects if Jitsi Meet is running in old jitsi-meet-electron app and
warns the user for scurity issues.