* Move resend code buttons above keyboard
* add showHelpText to verification code screen state
* hook up help button, does nothing yet
* show help bottom sheet
* lint
* pr feedback
* show back to back errors on verification code screen
* handle verification code attempts exhausted
* let the user resend a code after submission attempts are exhausted
* clear last digit after an incorrectly entered verification code
* wipe errors and allow proceeding when changing e164
* lint
* Don't wipe local kbs state when kbs stuff fails for change number; its still valid for the old number
* remove remaining error sheet todos
* fix tests
* put rereg mode params into a struct for sharability
* add step and UI handling for when we become deregistered during post-reg steps
* handle dereg when syncing push tokens
* show generic error on kbs backup failure
* handle dereg when restoring from kbs
* handle dereg during profile setup steps
* finalize pni stuff before deregistering
* add comment
* change debug fail to log
* Navigate to verification vc before showing popup so that we don't cancel the nav controller pop
* send a session sms code even if we get interrupted right after session creation
* improve state handling for initial session sms code
* nit: make var fileprivate
* show error when state changed on screen
* add non-failable resetForReRegistration method to tsAccountManager
* shim out tsaccountmanager resetForReRegistration
* Don't wipe tsaccountmanager state in re-registration until necessary. gate exiting re-registration on this step
* fix tests
* Add splash controller for change number flow
* Add copy of change number phone number entry controller
* add copy of change number confirmation view controller
* hook up change number phone number entry screens
* fix header color
* fix change number error view
* add some spacing before error label
* run auto genstrings
* actually fix string comment
