When registering a new user during an inline login, preserve the room we started...

When registering a new user during an inline login, preserve the room we started from.
This commit was brought to you from the front seat of my car.  I have some time to kill and I've got
my netbook tethered to my awesome Android phone hooked up to the T-Mobile network.  I'm not some
snobby metropolitan self-importanterati with an iPhone.  Android is where it's at, and where it
will continue to be.