Map auto-centering should turn itself off

[donpdonp]

"Is there a way to stop the page from re-centering every time it
refreshes? I find more often than not I want to scroll around, possibly
looking at the track history, but when an update occurs I get snapped
back to the most recent data point. I find it jarring.

Maybe detect if someone has manually moved the map and if so, disable
the re-centering? That way it could still work for someone to open the
map and just leave it open."