Don't show login password by default in server details view

Let's prevent the user from inadvertently allowing shoulder surfing. (They might click the "details" button leading them to this view without wanting to reveal the password to bystanders, e.g. to see what details all are available there.

(Not pretty at all, but works as far as I can tell. Something like the spoiler blocks on Stack Exchange or those little clickable eye-icons in some password entry fields would of course be nicer.)