Extend the limits with password

[TkKonstantin]

Would be great to an option to extend the limit only via typing password. Could be initially turned on in setting, together with setting up password there. The idea is not in restricting someone else, but rather having a password that additionally forces you to do something useful instead. E.g.: password - "Yes, I want to waste my time on this useless ..." A password could even be shown in the limit screen and just could not be copied, so you need to retype it by yourself.