Update UNSET Region Screen

[rcarteraz]

Removes flasher as it's no longer an option, and replaces with web. Also pluralizes client.

[GUVWAF]

Looks good.
While we're at it, maybe we can also replace the warning: node_db_lite full! erasing oldest entry\n message to something like Warn: node database full!\nErasing oldest entry\n, which makes more sense to the average user and fits on smaller screens.