ref: 39685c1c2aafdab9f97846cc1c6154c4ca34af32 sgx-jmp/lib/web_register_manager.rb -rw-r--r-- 483 bytes
Registrations that start on the web will have a tel selected already

So, manage any already-known tel selections and allow registration to use them
right away.  In the future this will fall back to letting the user search for a
tel over XMPP, but that is not implemented here.