[bug] SQ_ALLOW_REGISTER: "open" makes adding new admins impossible

[utkonostracker]

Currently the only way to add new admins is to send invite from start admin account.
But if you set SQ_ALLOW_REGISTER to "open" in your config file, your admin account loses access to invite function making you unable to add new admins.

Please consider making admin invites available for both "open" and "invite" SQ_ALLOW_REGISTER settings.