EFI Password Unreliable

When using a firmware password configuration it works about half the time.

Best I can tell it's a timing issue. The "return/enter" key is pressed too quickly after the last firmware password character. I believe adding a slight delay, or even adding an option to set the delay after the password is entered, would mostly fix this.

Important for us for this to work reliably since all our machines have firmware set. Having to retry multiple times per Mac isn't great.