Delegate which was responsible to dismiss AddAccountViewController
whenever presented view controller dismissed is not needed. So removing
it simply will go to previous screen from where user comes.
Add responder switch to streamline login flow
This change achieves two things:
- When the user presses Return and the email field is selected, the cursor now switches to the password field (as expected by the user).
- It enables iOS to pick up login and password field and enables password autofill.
