[Lock screen] Make clearPassword() do what it says
Right now the clearPassword() signal does not actually clear the password; it only selects all text. This is a violation of its name as well as being pointless since there's no longer a way to see the unmasked text, which means you always need to re-enter the whole password anyway.
If and when this lands, I will submit a follow-up patch to fix 412252 by firing this signal after a failed password attempt in the lock and login screens
Edited by Nate Graham