Improve the Customer Facing In-Person UI

[knightcode]

We just started using the in-person iOS SDK. Holy Hell, the UI is bad.

Can you make the signature box transparent, so that it matches whatever we set the background color to. Then just give it a border that's the same color as the text font color (if you don't want to add another setting).

And can we set the font? Or can you pick a better one, please.

[jebrick]

Thanks for your feedback on the In-Person SDK UI.  I will add this update to our backlog.