Unlock button jumps around

[corobin]

The UX for the unlock screen is incredibly annoying.

The unlock button is stickied to the bottom of the screen and moves depending on whether the keyboard is open or not.

That creates a situation where while inputting the PIN the unlock button is somewhere in the middle of the screen.

But because the app automatically dismisses the keyboard once the requisite number of digits in the pin is inputted, the unlock button jumps to the bottom of the screen at the exact moment the user is trying to press it.

It results in the following bad workflow:

1. user enters pin
2. user presses empty space in the middle of the screen where the unlock button used to be
3. user has to reorient and press where the unlock button now is

There are two low-effort fixes:

1. do not auto-dismiss the keyboard

2. sticky the button to the input field, instead of the screen. this is how the bc services card app does it and probably comes free with the app alignment in Device security option #1556

neither is a great solution but they should both be workable and address the major usability problem