Allow users to display the typed password on boot-up

I had set up full-disk encryption using Ubuntu's installer. One day, after rebooting, I could not get my new password accepted. I tried again and again. Eventually, I realised that I was typing in the wrong keyboard layout.

I have a feature request: please allow the user to display the password. Maybe provide a keyboard shortcut like F1, with the message printed to the screen: "press F1 to display the password field".

This would have saved me so much time and would have enabled me to realise what the problem was much sooner.

Note that there is no way to verify what keyboard layout is active, as whatever you type is hidden with asterisks. Even changing to another virtual terminal does not let you display what you have typed. This makes it even more important to allow the user to see what they had typed in the password field if they want to.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: cryptsetup 2:2.0.2-1ubuntu1.1
ProcVersionSignature: Ubuntu 4.15.0-74.84-generic 4.15.18
Uname: Linux 4.15.0-74-generic x86_64
NonfreeKernelModules: lkp_Ubuntu_4_15_0_74_84_generic_62 nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Feb 10 17:00:31 2020
InstallationDate: Installed on 2018-11-11 (456 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: cryptsetup
UpgradeStatus: No upgrade log present (probably fresh install)
cmdline: BOOT_IMAGE=/vmlinuz-4.15.0-74-generic root=/dev/mapper/ubuntu--vg-root ro recovery nomodeset
crypttab: sda5_crypt UUID=468ac93a-3550-47de-9c97-80fc5e697728 none luks,discard