Make scrolling work like a terminal

[markjaquith]

Right now, you can either enable "Scroll on new log", and every new log will scroll you to the bottom, or you can disable it, and you'll never get scrolled to the bottom.

Neither of these is what I want. I would like it to work like a terminal that I'm running tail -f on. Whereby, if I'm at the bottom of the data, it scrolls me down on new logs. But if I scroll up from the bottom to look at something particular, it stops scrolling me to the bottom. And when I'm done looking at something and scroll to the bottom again, it starts auto-scrolling again.

Honestly, this should just be how it works for "Scroll on new log". The manual up scroll should act as a signal that "I want to look at something above here" so of course you don't want it jumping back down immediately.