Let me see if I can work it into a 4.1.0 in the next 2 weeks for you and those who will miss it. I can assure you that it will be a major pain in the butt if you spend any time in the dashboard.
WP 3.6+ (if you are on a bleeding edge version on any dev site, they've already pushed out 3.7-alpha due for release in October and 3.8 in December) has the Heartbeat API, which brings up a pop-up login form when you've had session inactivity. When that pops up, that form is pulled from wp-login.php, which is a redirect, so bye-bye from whatever you were just working on. Time to go back to your hidden login, log back in, and navigate back to where you were.
It personally drove me nuts for 2 months knowing it was coming for everyone using the plugin (see download stats to see my anxiety).
I did find a way to disable the Heartbeat API and forwarding of addresses like /login and /dashboard and /admin to various locations in the install, so perhaps those as options, also, would make for a comprehensive settings page.
I've got 4 or 5 full-site projects backed up and a deadline on one today and another next Friday, so it'll be at least 10 days. A few hefty contributions will aid in sitting down and re-coding those options. This was the result of 2 months of thinking and researching, 5 hours of re-coding the entire plugin for efficiency, and 5 hours of squashing the backward-compatibility issue for people who haven't been to the Settings page yet.