Move helptext for mobile to phone.

Also make phone mandatory, all the time.

Change-Id: Iba016e3ad9286389e30a30eeef5089a8ba07f7de
Change the way we pick the application_type.

We don't want application_type to be chosen initially if nothing
configured. Force the user to decide.

Change-Id: I1b453e76e105aee6bdb738128d5a127ac14453e1