#overrideWeakCryptoPanel was removed in bug 1321778, so the CSS is dead and I removed it. Otherwise I'm dragging the 2 advanced panel bits into using .hidden instead of inline CSS, and using the single 'advanced-panel' class to handle more of their styling, with the box background/border moving to an ID selector to keep it specific to the bad cert bits. Differential Revision: https://phabricator.services.mozilla.com/D129027