[UI] Refresh Passcode UI

[hosy]

The passcode UI should get a more iOS like UI.

The current passcode has in my opinion some problems:

• Square Button not really iOS like
• Font size to small, not so easy to read
• Button Background Color to dark

I have two design suggestions which can you see below.

• Increased the font size
• Round Button, also used in iOS for passcodes

I added two different designs, please vote which one to you prefer or give suggestions, what we can do better.

Important for the development should be, to test it with:

• External keyboard connected
• Accessibility enabled (use accessibility label)
• Check iPad UI (use viewController.modalPresentationStyle = UIModalPresentationFormSheet;)

Draft 1:	Draft 2:

[haukman]

I prefer Draft 1 as it looks a bit "lighter" and not so heavy as Draft 2.