Chat: Prevent PMs to unregistered users
Chat: Prevent PMs to unregistered users

Suggested - matching behavior with locks as at the moment, a registered user can PM an unregistered user and have no idea why they aren't responding.

svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown,svivian/Pokemon-Showdown,xfix/Pokemon-Showdown,xfix/Pokemon-Showdown,svivian/Pokemon-Showdown