Also fixed a bug. We DO have to listen to the 'remove' event for roster items.

For now just make sure the user is informed that pw is required.

until after we are sure that the user has actually entered the room

Added a form with inputs for the configuration options (not yet usable)

Add a configure button on chatrooms when the user is the chatroom owner.

For now we just create an instant chatroom, but eventually we must provide a
way through the UI in which the user can request to configure the room.