fix visual bug in Add Card cell
fix visual bug in Add Card cell

stripe/stripe-ios,stripe/stripe-ios,NewAmsterdamLabs/stripe-ios,NewAmsterdamLabs/stripe-ios,stripe/stripe-ios,fbernardo/stripe-ios,fbernardo/stripe-ios,fbernardo/stripe-ios,stripe/stripe-ios,NewAmsterdamLabs/stripe-ios,stripe/stripe-ios,stripe/stripe-ios,NewAmsterdamLabs/stripe-ios,fbernardo/stripe-ios