core: move fail_timeout from input-field to general

[PointerDilemma]

Initial version of this PR intended to fix some edge cases when rapidly providing input, where you would see the fail color, but no fail text placeholder.

Now it does that plus moving the input-field:fail_timeout setting.
It is easier and more flexible to handle the duration for which an auth failure gets displayed outside of the PasswordInputField widget.
Now per input-field fail_timeout settings wont be supported, but that didn't work anyways (smallest fail_timeout always took precedence)

[PointerDilemma]

So input-field:fail_timeout -> auth:fail_timeout.
Or should it be general:fail_timeout??

Edit: picked general:fail_timeout, since its a setting related to authentication directly.

[vaxerski]

up to you

[PointerDilemma]

I feel a bit bad about the breaking change, but I think it's just necessary.
It sucks having that within the input-field.

@vaxerski for merge cause related wiki mr