Vertical centering of passcode view iPad Mini, iPhone 4s, iPhone 5

[bhavinchitroda]

Views are not properly vertically aligned in case of set Passcode, change Passcode and enter Passcode modes. In first case (set Passcode), "Enter a passcode" label is hidden behind navigation bar. Also the places of that label and boxes changes based on different modes. The behavior should be similar in every case.