Immediate feedback on send + unread count badges.
Signup flow: request call.

• enables the "Send Again button"
• enables the display of the number the user entered in the Registration View in this subsequent scene (so they can see whether they should go back or not)
• enables the "call me instead button"

Reviewed-by: @FredericJacobs
Signup: Remove animation
Signup: remove unused segue
SignUp: add call to super