Fix a couple things with the config wizard and change toolhead wizard
Fix a couple things with the config wizard and change toolhead wizard

First, this removes the ready page when firmware flashing page isn't used
Also, it fixes T424, by asking to flash firmware if a non standard
toolhead is selected during 'add new machine' wizard.

alephobjects/Cura,alephobjects/Cura,alephobjects/Cura