Improve recovery screen (bip39 words)

[stepansnigirev]

Entering the recovery phrase is still pretty painful.

I see two solutions:

• change the orientation to landscape mode just for this screen - keyboard will be larger
• add suggestions on top of keyboard, similar to modern phones
• try something like swipe keyboard

[dimaatmelodromru]

• allow entering only first 4 characters of each word, proceed to Next word automatically (turn on/off on the input screen)
• optimize swipe for BIP39 words first 4 letters for extra robustness and speed of input
• sound feedback via Waveshare scanner buzzer when auto-proceeding to the next word (turn on/off on the input screen, default - on for 4-char input). Screen could flash in silent mode.
• display cursor or highlight active input field for clarity
• I don't think suggestions is a good idea. Good idea is to train the user's motor memory)
• Test and optimize word input until it is so easy and fast that other complex security features are just not necessary)

[dimaatmelodromru]

BTW, there is a glitch: if you start inputting words, then press Back, then press Enter Recovery Phrase again, you are presented with an empty word input screen that is being filled with your previous input after you start new input

[stepansnigirev]

In #66 we added autosuggestions, still not perfect but already better. Swipe would be great but looks pretty complicated to implement. I am also thinking about adding a "rotate screen" button for screens with the keyboard, then buttons would be larger.